Restoring Full Backup Error: Stream_vdi.Invalid_checksum
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I am running xo-server 5.103.1 xo-web 5.104.0 built from sources on Debian GNU/Linux bookworm/sid with all packages up to date. The XO instance has 6GB of memory and 16 CPU's assigned.
I have several "Full Backup" jobs going to a TrueNAS server via an SMB remote and they are backing up successfully without any errors. I am not using the "Store backup as multiple data blocks" for this remote. While I was doing a test restore of one of the larger VM's which is about 220 GiB it failed and gave me the error below.
I keep a few versions and the older backup worked so I was assuming that backup was somehow corrupted. I ran the "Full Backup" job again and it completed successfully then tried to restore and same error message but different "Block Ref:" number in the error.
I have backed up and restored this VM from a NFS remote on the TrueNAS which is using the "Store backup as multiple data blocks" options and it is working just fine.
I know lots of people are using SMB for the remotes so I am looking for some insights as where to look to figure out if this is an issue with using SMB for the remote with larger VM's or if this is just something broken in my XO instance.
{"code":"IMPORT_ERROR","params":["INTERNAL_ERROR: [ Stream_vdi.Invalid_checksum(\"Block Ref:69/00156509 checksum failed: original = 36C730AC922C3EBB; recomputed = D7D6772B5F65D4E1\") ]"],"url":"https://192.168.3.95/import/?sr_id=OpaqueRef%3A8e6025c8-30e6-4744-a1da-9895a38d67be&session_id=OpaqueRef%3Ae5d922e1-ad47-4141-a3ab-51fc0b12b6a6&task_id=OpaqueRef%3Ab016656c-97d1-41a5-a855-69b9f2531cc7","task":{"uuid":"6c886135-4ecb-e723-d438-bda19a6a4568","name_label":"[XO] VM import","name_description":"","allowed_operations":[],"current_operations":{},"created":"20221017T11:02:32Z","finished":"20221017T11:12:55Z","status":"failure","resident_on":"OpaqueRef:ccfe0e03-5b7d-46ac-a8ef-35d63c9ba5e7","progress":1,"type":"<none/>","result":"","error_info":["IMPORT_ERROR","INTERNAL_ERROR: [ Stream_vdi.Invalid_checksum(\"Block Ref:69/00156509 checksum failed: original = 36C730AC922C3EBB; recomputed = D7D6772B5F65D4E1\") 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Array.forEach (<anonymous>)\n at Xapi._processEvents (/etc/xo/xo-builds/xen-orchestra-202209302029/packages/xen-api/src/index.js:978:12)\n at Xapi._watchEvents (/etc/xo/xo-builds/xen-orchestra-202209302029/packages/xen-api/src/index.js:1144:14)\n at runNextTicks (node:internal/process/task_queues:60:5)\n at processImmediate (node:internal/timers:442:9)\n at process.callbackTrampoline (node:internal/async_hooks:130:17)"} -
Ping @florent on this
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hi @lawrencesystems,
is there a way to give me access to your XO and look at the files on the samba ?
Full backups ( as in the *.xva files ) are untouched by vhd directory.
Regards,
Florent
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I am going to be out of town until next week, but I can keep the backups so we can arrange a time to test it.
I have done a few more tests, I setup a Synology using SMB and it backs up and restores just fine. I also moved the existing backups over to an NFS share and that previously created backup gives the same Stream_vdi.Invalid_checksum error with the same block number on restore.
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@lawrencesystems we don't do any magic on the xva (yet) . It's probably an error coming from the host, and I wuld like to investigate if possible. It's great it you can keep the files.
Do you use encryption ?
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Yeah, sounds like a somehow corrupted XVA that can't be imported. The checksum computation fails on the host. So likely the XVA is corrupted, alternatively a transfer issue corrupting the file, but I'm less sure about this
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What could be interesting: importing the XVA with
xeCLI and see if the result is the same. -
No encryption on this remote. And if I have time before I leave I will test importing the XVA with CLI and see what error I get.
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I really think there is some bug in the TrueNAS Core SMB stack that I am fighting here because this issue
https://xcp-ng.org/forum/topic/6148/delta-backup-showing-success-no-delta-saved?_=1666089968101
I had reported before was only happening on TrueNAS Core via SMB. Also this is solved sine XO that extra integrity checking feature was added to the delta backups. -
@lawrencesystems We added the healthcheck for full backup (here : https://github.com/vatesfr/xen-orchestra/pull/6401 )
Also we removed our js smb implementation ( https://github.com/vatesfr/xen-orchestra/commit/b50e95802c6a876d4e6ffd0c62c209a187b1bfb2 )to try to circumvent the strange samba comportment
closed fix(backups): add healthcheck to full backup #6401
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A ajpri1998 referenced this topic on
