Vgcfgrestore pvs marked as missing lvm. Restore PV First [root@cactiDB lvm apt-get install lvm2.

Hello, I tried to add more space to my Volume Group in Fedora 17 and the process seems to have borked: LVM did not restart. Repeat for all other missing PVs in the VG. vgcfgrestore backup WARNING: Couldn't find device with uuid C6UTtx-omjQ-hcNw-N8Vd-hxwy-1Yed-uT7PMc. Cannot restore Volume Group ubuntu-vg with 1 PVs marked as missing. Aug 23, 2018 · Welcome to LinuxQuestions. Cannot change VG VGExaDb while PVs are missing. Previous message (by thread): [lvm-devel] master - vgscan: fix process_each args Next message (by thread): [lvm-devel] master - lvmetad: process new connections after shutdown signal Apr 11, 2013 · I have a server with debian and proxmox 2. Very next second i realised this and i tried to recovering it as below lvremove /dev/pve/data ls -lrt /etc/lvm/archive head /etc/lvm/archive/ vgcfgrestore restores the metadata of a VG from a text back up file produced by vgcfgbackup. vg vg-data # create a second backup cp vgdata_backup. Jan 22, 2016 · Could it be Testdisk ignored the LVM, then wrote the partition table straight to /dev/md0 sort of shunting the LVM (if that makes any sense)? Edit 9: Where is my LVM FWIW, I rebooted, still on Debian Live and after installing mdadm, the raid is automatically assembled even before lvm2 is installed (only liblvm2app2. For example, 4. Aug 28, 2020 · This apparently had happened because LVM had added the flag “m” (“MISSING”) to 1 of the PVs (LVM’s Physical Volumes). 您可以恢复损坏的或者使用新设备替换的物理卷上的元数据和标头。. vgcfgrestore allows you to restore the metadata of VolumeGroupName from a text backup file produced by vgcfgbackup. # This is because in order to restore, the vgcfgrestore commands needs to see the same PV's (including matching UUID's) on the system as existed before. What I've already done : Code: # fdisk -l. If no backup file is. It'll say that a UUID is missing and this is what you need. 17. The /etc/init. Growing a File System on a Logical Volume; 4. 87 GiB". However LVM operates from on-disk metadata. A PV can be placed on a whole device or partition. Jun 19, 2022 · Then use vgcfgrestore --file filename to restore the VG's metadata. I can't see anything in vgs, lvs and /home is not able to find, neither I can mount it. How can I fix lvm PV name "[unknown]" without forcing the removal of second PV from VG ? 5. [root@apollo ~]# vgcfgrestore -f /etc/lvm/backup/vg0 vg0 Couldn't find device with uuid 20zG25-H8MU-UQPf-u0hD-NftW-ngsC-mG63dt. Backups of metadata in /etc/lvm/backup/ and /etc/lvm/archive/ are text files, logging all sorts of useful things: device WWN, PV name and ID, LV name ID and extent map, VG name and ID. WARNING: Volume group mg20 is not consistent. It does not have backups because the RAID setup was meant to be the redundancy. ¿Cómo puedo restaurar este lío ? Gracias mucho Jul 15, 2022 · I was able to recover the mddevice but so far I haven't been able to recover the Pv, vl a or VG. 8, “Customized Reporting for LVM”. Bug 1348327 - vgcfgrestore segfaults if attempted with missing PV. /etc/lvm/backups/vg0 tiene lo siguiente para el volumen físico: Sep 29, 2020 · Metadata location on /dev/sda3 at 274944 begins with invalid VG name. Logical Volume Creation Overview; 4. com * extras: mirrors. Cannot change VG vg3 while PVs are missing. vgcfgrestore reports it can't find the PVs: # vgcfgrestore vgclients Couldn't find device with uuid PyKfIa-cCs9-gBoh-Qb50-yOw4-dHQw-N1YELU. archive files of VolumeGroupName . Device still marked missing because of alocated data on it, remove volumes and consider vgreduce --removemissing. el7_9. You can use Logical Volume Manager (LVM) tools to troubleshoot a variety of issues in LVM volumes and groups. OK, I Understand vgcfgrestore --force vg3 Couldn't find device with uuid RQr0HS-17ts-1k6Y-Xnex-IZwi-Y2kM-vCc5mP. Code: #mdadm --examine --scan /dev/sdd1 /dev/sde1 /dev/sdf1 /dev/sdg1. If a PV in the VG is lost and you wish to substitute another of the same size, use pvcreate --restorefile filename --uuid uuid (plus additional arguments as appropriate) to initialise it with the same UUID as the missing PV. vg # open the config nano vgdata_new. The above command created all the missing device files for me. lvm start script will scan and activate the volume group at boot time. I recently lost a RAID that was a physical volume of one of my linux LVM volume groups. d/boot. 7. Dec 3, 2021 · 问题现象 系统重启后，发现LVM中的一个VG丢失，具体现象截图如下。 原因分析 1、一般LVM的VG丢失都是由于突然断电或者更换了操作系统等原因引起。尝试执行vgscan命令扫描卷组，无果。尝试通过vgcfgrestore –f /etc/lvm/backup/data data 命令恢复VG卷组，提示以下错误 I had to restore md0 which has a raid5 array configured due to a mix up in the sdX order. When I had it restored (it did a rebuild), I could not get LVM to locate the PV and/or LV's on the array. We followed a lot of advise only, used pvcreate with the --uuid and --restorefile and then used vgcfgrestore to restore. The vgcfgrestore command by default uses the backup file in /etc/lvm/backup. These PVs exist on the system, they are not flagged as MISSING in LVM metadata and their on-disk metadata is correct. ) But the PV was not really “missing”, it was just marked as such. Missing device /dev/mapper/mpath73 reappeared, updating metadata for VG myvg to version 89. $ reboot. com Package 7:lvm2-2. Jun 3, 2019 · Doing a "Deeper search" takes quite a while but returns these results immediately: contents of the /dev/mapper/ directory: pvdisplay -m output: output of what I believe to be the last known good lvm file, from /etc/lvm/archive: This post is useless without the output of various commands. For information on using the pvs command to customize your output, see Section 4. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. The physical volume (PV) is a partition or whole disk designated for LVM use. Repair the file system on the LVM device. So you can find the plain-text metadata using, e. vgcfgrestore restores the metadata of a VG from a text back up file produced by vgcfgbackup. aliyuncs. 使用 pvcreate 和 vgcfgrestore 命令修复带有损坏的 LVM 标头和元数据的磁盘. May 12, 2020 · (it's for 2 months ago when I created the LVM) But it returned . Use --list for a list of the available back up and archive files of a VG. How can I restore this mess ? Thanx a lot Aug 20, 2018 · Running "pvscan --cache" should refresh it. The number of cylinders for this disk is set to 1435. Can't remove locked LV var lvremove -fff vg3/var Couldn't find device with uuid RQr0HS-17ts-1k6Y-Xnex-IZwi-Y2kM-vCc5mP. When I try to remove PV, I get: Jan 16, 2017 · Cannot restore Volume Group cactiDB with 1 PVs marked as missing. Some types of LVM commands report one or more PVs as missing. specified, the most recent one is used. "/dev/md2" is a new physical volume of "499. Now lvscan -v showed my volumes but they were not in /dev/mapper nor in /dev/<vg>/. cloud. Hi all, I been trying to recover a volume group of single PV. download PDF. Logical Volume Backup; 4. Cannot restore Volume Group VG_XenStorage-5080d657-28dc-262e-e379-b51903e53792 with 1 PVs marked as missing. Cannot restore Volume Group VolGroup with 2 PVs marked as missing. org, a friendly and active Linux Community. May 20, 2020 · 1. Like most LVM operations, the vgreduce command is reversible if you immediately use the vgcfgrestore command to restore the volume group metadata to its previous state. 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors. The setup: Ubuntu 16. Mar 12, 2015 · 1. This may take a while Couldn't find device with uuid 'DHmMDP-bqQy-TalG-2GLa-sh6o-fyVW-3XQ3gp'. So the recovery is to just put the disk back. Cannot restore Volume Group vgoraData with 1 PVs marked as missing. The file must exist in /etc/lvm/devices/ and is managed with the lvmdevices(8) command. TEST MODE: Metadata will NOT be updated and volumes will not be (de)activated. LVM Administration with Jun 18, 2013 · To do this, you'll need to know the failed disk's UUID by using pvscan. 您可以恢复损坏的物理卷上的元数据和标头，或者使用一个新设备替换。. Some LVs were moved successfully, some not. Since the physical disk was removed from the server, it still had the LVM metadata on it, including the UUID. [root@broken-server ~]# vgscan. Managing LVM volume groups. It is recommended that you run the vgreduce command with the --test argument to verify what you will be destroying. Within a volume group, the disk space available for allocation is divided into units of a fixed-size called extents. Then use vgcfgrestore --file filename to restore the VG's metadata. 4. SEE ALSO lvm(8) , vgcreate(8) Sistina Software UK LVM TOOLS 2. Sometimes, you might accidentally remove a logical volume or want to restore the deleted logical volume from the volume group. As an example, lvs reports the missing PVs, while pvs does not. vg # search for the size of your missing pv, the 512 is the block size, which can remain like this [lvm-devel] [PATCH] Generate an archive (if possible) and a backup for metadata while running vgcfgrestore Peter Rajnoha prajnoha at redhat. I finally found that I needed to activate the volume group, like so: vgchange -a y <name of volume group>. If you are using a whole disk device for your physical volume, the disk must have no partition table. A back up file can be specified with --file. To replace PVs, vgdisplay--partial--verbose will show the UUIDs and sizes of any PVs that are no longer present. vgreduce unknown Chapter 4. For example, pvcreate --uuid 56ogEk-OzLS-cKBc-z9vJ-kP65-DUBI-hwZPSu /dev/sdc. Managing LVM physical volumes. Run “pvscan” command to verify if you can see the “checksum errors” now. $ sudo wipefs -a /dev/sdb2. In a less degraded scenario without missing PVs, pvmove will move extents between PVs, and can be used in storage migrations. Cannot restore Volume Group vg3 with 1 PVs marked as missing. 1. lindsay@htpc:~$ sudo vgreduce vg /dev/sdc1 Cannot change VG vg while PVs are missing. At this point, I haven't created them yet. If an LVM command is not working as expected, you can gather diagnostics in the following ways. LVM was picking up the old metadata from an old partition lying around, so by wiping the old partition and rebooting, I removed the duplicates. Devices not listed will appear to be missing. You don't need to call pvremove on a missing volume. # lvchange -a y /dev/vg01/lv01. This was my home file storage setup. LVM meta data backup files are stored in /etc/lvm/backup and /etc/lvm/archive. --uuid uuid (plus additional arguments as appropriate) to initialise it with the same UUID as the missing PV. Then, type vgcfgrestore volgroupname where PV in the VG is lost and you wish to substitute another of the same size, use pvcreate --restorefile filename. If no backup file is specified, the most recent one is used. LVM and device-mapper development team: 4. vgreduce --select. Reboot the server. Run vgcfgrestore to restore the LVM meta data. 这些指令应当非常谨慎地使用，只有在您 If a PV in the VG is lost and you wish to substitute another of the same size, use pvcreate --restorefile filename --uuid uuid (plus additional arguments as appropriate) to initialise it with the same UUID as the missing PV. Four-disk RAID 5 array using mdadm (4x2TB): /dev/md0. WARNING: Device /dev/xvdd1 still marked missing because of allocated data on it, remove volumes and consider vgreduce --removemissing. Scenario 1: If the disk was just removed without preparing LVM, then just put the disk back in the server and reboot. This overrides the devices file. Oct 24, 2008 · vgcfgrestore output # vgcfgrestore vgoraData Couldn't find device with uuid 'a3onP5-RdbR-fdgq-sDkS-ZtFs-83Q5-kFJj43'. 02. 44-cvs (02-17-09) VGCFGRESTORE(8) Aug 2, 2021 · WARNING: Missing device /dev/xvdd1 reappeared, updating metadata for VG VGExaDb to version 44. Thankfully, LVM stores a fairly large header, including multiple backups of the metadata, in plain text. pvremove wipes the PV label on an existing volume. Then, when you have the new disk in the server, type: pvcreate --uuid uidhere /dev/sdc where "uidhere" is the UUID you got from pvscan and /dev/sdc is the new disk device. LVM Administration Overview; 4. This might have happened due to a physical shock to the machine (I don’t see any other possible reason We use cookies for various purposes including analytics. The Metadata Daemon (lvmetad) 4. 5. 2. Oct 4, 2016 · 5. Not an answer to my question as posted, but a solution to my problem and hopefully useful to anybody in the same boat. 警告. On the Logical Volume named vg0, an XFS file Links; System ID Private Priority Status Summary Last Updated; Red Hat Product Errata RHBA-2009:1393: 0 normal SHIPPED_LIVE lvm2 bug-fix and enhancement update # check again for available lvs and pvs lvs -a pvs -a # create config backup of the vg with the missing cache pv vgcfgbackup -f vgdata_backup. No matching physical volumes found. Couldn't find device with uuid 'a3onP5-RdbR-fdgq-sDkS-ZtFs-83Q5-kFJj43'. Don’t forget to uncomment the /dev/sales/reports device in the /etc/fstab file. Mount the logical volume and verify if the data is intact. 2 is). Restore PV First [root@cactiDB lvm apt-get install lvm2. Chapter 17. Sep 12, 2022 · [y/n]: y WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q. Can't remove locked LV var pvmove --abort Couldn't find device with uuid RQr0HS-17ts-1k6Y-Xnex-IZwi-Y2kM-vCc5mP. You can specify a. Gathering diagnostic data on LVM. Code: [root@tkdb ~]# fdisk /dev/sdj. 6. pvs couldn't find device with uuid. So I went even further, and inserted the disk back – its failed, but it is detectabled for a bit. # ls /data. You need to restore the UUID for the device as displayed by pvscan, and then run vgcfgrestore to restore the LVM meta data. vgdisplay--partial--verbose will show you the UUIDs and sizes of any PVs that are no longer present. Code: [root@broken-server ~]# pvscan. . Creating LVM Volumes in a Cluster; 4. This option can be repeated, or accepts a comma separated list of devices. If you intend to remove the device, first remove the disk from the volume group, then from the server. unknown linux device mapper. LVM Administration Overview. produced by vgcfgbackup. Oct 20, 2022 · macronus Asks: Locked LVM logical volume in VG with missing PV. Cannot restore Volume Group vgclients with 2 PVs marked as missing. This writes VG metadata onto the devices specifed in back up file. 3. couldn't find device with uuid. As shown in the output the Logical volume lv01 is successfully restored from the metadata backup of VG. Explore Zhihu's column for a platform that allows you to express yourself through writing freely. Nov 2, 2023 · Restore the missing disk's UUID. (See column “Attr” after $ sudo pvs. Couldn't find device with uuid 4deOKh-FeJz-8JqG-SAyX-KviL-UGu4-PtJ138. [lvm-devel] master - vgcfgrestore: use lvmetad disabled state David Teigland teigland at fedoraproject. 您可以通过重写物理卷的元数据区域从物理卷中恢复数据。. 187-6. com vgcfgrestore says this: [root@dal01 backup]# vgcfgrestore vg_dal01 Couldn't find device with uuid EUBjbv-JVpH-6QLv-yAxX-dopZ-CDHg-BOcpXa. I did not account for what happened and am paying the price. Put the disk back in the server to restore the LVM volume. backup file with --file. PDF. If you added the fake PVs to your volume group, then you need to reduce the volume group using vgreduce. There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e. Displaying LVM Information with the lvm Command; 5. Now it is behaving strange. pvs shows unknown device in redhat. 6. The vgcfgrestore command is getting failed DESCRIPTION. You can remove all the logical volumes that used that physical volume from the volume group with the --removemissing argument of the vgreduce command. An extent is the smallest unit of space Jul 15, 2021 · DevOps & SysAdmins: (LVM) Cannot restore Volume Group with 1 PVs marked as missing. If a PV in the VG is lost and you wish to substitute another of the same size, use pvcreate--restorefile filename--uuid uuid (plus additional arguments as appropriate) to initialise it with the same UUID as the missing PV. linux pvremove unknown. Use --list for a list of the available backup and. (es de hace 2 meses cuando creé el LVM) Pero volvió . Sin embargo, blkid puede encontrar esos UUID: vgcfgrestore allows you to restore the metadata of VolumeGroupName from a text backup file. 3. Aug 3, 2023 · I have Centos 7. If the disk was reprovisioned and unavailable, an empty disk could be used, but the filesystem would be compromised. # mount /dev/mapper/vg01-lv01 /data. An LVM disk label is written to the device, and LVM metadata areas are initialized. Well, today I found that RAID (it was hiding, don't ask). Couldn't find device with uuid FXfSAO-P9hO-Dgtl-0Ihf-x2jX-TnHU-kSqUA2. Logging; 4. The result is we see the logical volumes again, with their original name and size. Found volume group "vg_test" using metadata type lvm2 Let's check what is on the missing device: # pvs -o +uuid vgdisplay--partial--verbose will show you the UUIDs and sizes of any PVs that are no longer present. 4 GB, 2000398934016 bytes. WARNING May 24, 2014 · Incomplete volume groups will be activated read-only. You can specify a backup file with --file. Oct 5, 2016 · If a PV in the VG is lost and you wish to substitute another of the same size, use pvcreate --restorefile filename --uuid uuid (plus additional arguments as appropriate) to initialise it with the same UUID as the missing PV. Use vgcreate (8) to create a new VG on the PV, or 17. Disk /dev/sda: 2000. Restore the LVM meta data. vgcfgrestore output. For example, if you used the --removemissing argument of the vgreduce command without the --test argument and find you have removed logical volumes you wanted to keep, you can still replace the physical volume and use another Removing partial LV var. ailed to find device for physical volume. Aug 1, 2014 · Code: grep '^description =' /etc/lvm/archive/*. Jan 20, 2022 · Resolution. device for pv not found or rejected by a filter redhat. 4. Couldn't find device with uuid, but the pv exists and blkid finds the sam The pvs command provides physical volume information in a configurable form, displaying one line per physical volume. Troubleshooting LVM. Yet blkid can find those UUIDs: pvcreate initializes a Physical Volume (PV) on a device so the device is recognized as belonging to LVM. I am in rescue mode, and I can't mount LVM partition to recover my backups. Repeat for all other Googling and reading indicates that I need to clear that MISSING flag, and that vgcfgrestore is the only tool for that job -- but editing that archive file to remove the MISSING flag and trying vgcfgrestore with that doesn't work: # vgcfgrestore --debug --verbose --test --file wtfvglinux vglinux Test mode: Metadata will NOT be updated. It was shutdown and moved to another location, connected all cables including SAN disk. Chapter 3. 5. com Thu Dec 2 14:30:01 UTC 2010 We're certain we'll lose some data, but we were trying to recover the LVM by using the files in /etc/lvm/backup or /etc/lvm/archive. The HardDisk is broken. vg vgdata_new. 这些指令应当谨慎使用，只有在您熟悉 vgcfgrestore restores the metadata of a VG from a text back up file produced by vgcfgbackup. org Mon Jun 20 16:20:23 UTC 2016. LVM Administration with Feb 16, 2017 · The disk which holds LVM metadata and data. Activate the volume group. restore lost LVM on md0 (1 PVs marked as missing) I had to restore md0 which has a raid5 array configured due to a mix up in the sdX order. vgcfgrestore informa que no puede encontrar los PVs: # vgcfgrestore vgclients Couldn't find device with uuid PyKfIa-cCs9-gBoh-Qb50-yOw4-dHQw-N1YELU. Jul 27, 2007 · Fortunately, the meta data and file system on the disk that was /dev/sdc are intact. archive files of VolumeGroupName. Failed to read metadata summary from /dev/sda3 Failed to scan VG from /dev/sda3 Couldn't find device with uuid 5aHd2g-Iqyy-CSSt-96D0-AXts-O5h0-SXYTr0. Archive this, perhaps all of /etc, as a part of a host level backup of the old instance. Cannot restore Volume Group vg_dal01 with 1 PVs marked as missing. Cannot restore Volume Group backup with 1 PVs marked as missing. Any attempt to change a VG or LV claims PVs are missing: Raw. The pvs command provides a great deal of format control, and is useful for scripting. On the array, a PV and LV managed by LVM. Going forward, to have volume groups survive hard drive loss, consider adding redundancy. This allows the PV to be used in a Volume Group (VG). You already wiped the first labels by doing pvcreate a second time. conf configuration file. I ended up doing a vgreduce --removemissing and got on with the business of restoring the data. , old versions of LILO) Oct 29, 2023 · LVM metadata. This writes VG metadata onto the devices specified in back up file. May 18, 2015 · When I got the system back up and running, arrays rebuilding, etc, I seem to have a situation where the pvs command (and vgs and lvs) reports No device found for PV <UUID> but the logical volume which is on the supposedly missing physical volume can be successfully mounted as their DM devices exist and are mapped in /dev/mapper. Afterwards I ended up with following state: – two locked LVs – volume group with missing PV. I fear that any "fix" that I suggest now might just make matters worse, but you might just need to run vgcfgrestore with the appropriate file to restore the LVM metadata. Yet blkid can find those UUIDs: Oct 31, 2012 · This is what I got about my missing volume group # vgcfgrestore vg00 Couldn't find device with uuid bf4yVy-k8Ue-V9PI-27V1-JumP-ETLU-J4eeuD. 4 logical volume(s) in volume group "vg" now active lindsay@htpc:~$ ls /movies/ lindsay@htpc:~$ sudo pvmove /dev/sdc1 Cannot change VG vg while PVs are missing. A volume group (VG) is a collection of physical volumes (PVs), which creates a pool of disk space out of which logical volumes (LVs) can be allocated. 11. Then use vgcfgrestore --file filename to restore the volume. There's still a backup: The issue is related to missing volume group and it is unable to recovered due to it’s header information is missing. com * updates: mirrors. , sudo strings /dev/sdb5 | less and use that metadata to restore the physical volume. So, I had disk failure and was moving LVs from the failing disk, to the new PVs. 04. Apr 18, 2015 · Scenario 2: If the disk is installed in the server, but still unknown, the LVM meta data may be missing. Consider vgreduce --removemissing. Cannot restore Volume Group vg0 with 1 PVs marked as missing. device for pv not found or rejected by a filter. Units = sectors of 1 * 512 = 512 bytes. Like most LVM operations, the vgreduce command is reversible in a sense if you Devices not listed will appear to be missing. Code: [root@tkdb ~]# vgcfgrestore vgoraData. and indicate which file you used for the "pvcreate --restorefile" it would help. Activate the LV to access the data onto it. I booted into partition manager and deleted the new parition but that seems | The UNIX and Linux Forums Nov 6, 2023 · vgcfgrestore restores the metadata of a volume group from a text backup file produced by vgcfgbackup. A sample of an lvs command reporting the missing PVs is: # lvs WARNING: Couldn't find device with uuid kkkkkk-kkkk-kkkk-kkkk-kkkk-kkkk-kkkkkk. Restore failed. [root@cactiDB lvm]# Solution: 1. If the problem is related to the logical volume activation, enable LVM to log messages during the activation: Set the activation = 1 option in the log section of the /etc/lvm/lvm. x86_64 already installed and latest version I accidentally deleted pve/data thin volume in proxmox. --devicesfile String A file listing devices that LVM should use. Cannot change VG myvg while PVs are missing. This causes LVM to provide more details in the system log. Feb 16, 2017 · LVM VG recovery. Example: [1/6] missing PV Rescan all devices on system # vgscan Reading all physical volumes. You should include them. Execute the LVM command with the -vvvv option. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. Then use vgcfgrestore --file filename to restore the volume group's metadata. g. Once the physical disk has been restored to the Jan 14, 2014 · restore lost LVM on md0 (1 PVs marked as missing) I had to restore md0 which has a raid5 array configured due to a mix up in the sdX order. I'm pretty sure they're still there so any help would be useful. See full list on golinuxcloud. You are currently viewing LQ as a guest. Cannot restore Volume Group vg00 with 1 PVs marked as missing. Oct 10, 2023 · 【lvm】lvm元数据丢失恢复 # yum -y install lvm2 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors. vgscan --mknodes -v. Running "pvscan --cache" should refresh it. To use the device for an LVM logical volume, the device must be initialized as a physical volume. Repeat for all other Jan 25, 2020 · remove a physical volume listed as an unknown device. dl hc ax ym bt qg rf ng ml na