Single snapshot restore from tape backup

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ssevasta

New Member
Jul 25, 2024
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Hi i am trying to restore a single snapshot from a tape backup however single restore is failing. I am having the below:
2024-12-16T08:10:25+01:00: Mediaset 'f5497f79-b7d2-4a71-97fd-137de7faa3c1'
2024-12-16T08:10:25+01:00: Pool: Proxmox_Pool
2024-12-16T08:10:25+01:00: found snapshot vm/105/2024-12-13T06:00:00Z on U2HFNSB0: file 10
2024-12-16T08:10:25+01:00: Phase 1: temporarily restore snapshots to temp dir
2024-12-16T08:10:25+01:00: Required media list: U2HFNSB0
2024-12-16T08:10:25+01:00: trying to load media 'U2HFNSB0' into drive 'Proxmox_Dr1'
2024-12-16T08:10:25+01:00: could not read optional volume tag: failed to fill whole buffer
2024-12-16T08:10:25+01:00: could not read optional volume tag: failed to fill whole buffer
2024-12-16T08:10:25+01:00: could not read optional volume tag: failed to fill whole buffer
2024-12-16T08:10:26+01:00: found media label U2HFNSB0 (288aa8e3-1abc-489c-bd69-22b4753c5e75)
2024-12-16T08:10:26+01:00: was at file 2, moving to 10
2024-12-16T08:10:26+01:00: Error during restore, partially restored snapshots will NOT be cleaned up
2024-12-16T08:10:26+01:00: TASK ERROR: could not restore snapshots to tmpdir: locate file 10 failed - Illegal Request, Additional sense: Invalid command operation code
 
Hello ssevasta! Could you please tell me the following:
  1. What version of the Proxmox Backup Server are you using? Is it the same version that you used for the backup from 2024-12-13T06:00:00Z ?
  2. What version of the LTO standard does the tape use? The Supported Hardware chapter of the Proxmox Backup Server states that LTO-5 or higher is supported, although LTO-4 might work or might need firmware updates.
 
1. i am using version 3.3.0
2. I created a VTL on a HPE store-once appliance, using lto5 tapes.
 
Thanks for the info. In your case, the Proxmox Backup Server tries to locate the file number 10 using the locate command. This command is available beginning with the LTO-5 standard. Unfortunately, while some tape drives advertise that they are LTO-5 compatible, they might miss certain commands should be present according to the standard. Sometimes such issues are fixed in later firmware versions, so I would highly recommend you to perform a firmware update and try again.
 
I have 2 other hpe storeonce appliance that have the latest firmware. I will use those to test again. can i ask you if i only need port TCP : 3260 to be opened between my appliance and PBS? Thanks
 
iSCSI uses TCP port 3260 as its default, although it can alternatively use port 860, as specified by RFC 3720. So port 3260 should be opened for communication over TCP.
 
Hi sorry for the late reply but i was on leave. i re installed pbs on a physical server, re-configured the VTL on a my HPE storeonce appliance, all backups are successful, however i still cannot restore a single snapshot from a tape backup. I only can restore all the snapshots on the tape.
 
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