Another data corruption, fortunately not fatal, with btrfs.
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Another data corruption, fortunately not fatal, with btrfs. Two mirrored disks that have little activity. On the same server, Proxmox 9, there is also a ZFS pool (mirrored, more active). Same type of disks.
An employee mistakenly connected an electric heater to a socket protected by the UPS, and the server rebooted brutally.
Upon reboot, one of the two btrfs disks reported:
[ 167.015266] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.017007] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.052517] BTRFS error (device sdd): open_ctree failed mount: /btrfs: can't read superblock on /dev/sdd.Result: unable to mount, even in degraded mode. The only way was to disconnect sdd and mount the other disk in degraded mode.
No issues with the ZFS pool.
Needless to say, I'm now copying the data to ZFS, and before tomorrow, these two disks will be a new ZFS pool.
Don't forget to connect the employee to the UPS, too.
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Another data corruption, fortunately not fatal, with btrfs. Two mirrored disks that have little activity. On the same server, Proxmox 9, there is also a ZFS pool (mirrored, more active). Same type of disks.
An employee mistakenly connected an electric heater to a socket protected by the UPS, and the server rebooted brutally.
Upon reboot, one of the two btrfs disks reported:
[ 167.015266] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.017007] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.052517] BTRFS error (device sdd): open_ctree failed mount: /btrfs: can't read superblock on /dev/sdd.Result: unable to mount, even in degraded mode. The only way was to disconnect sdd and mount the other disk in degraded mode.
No issues with the ZFS pool.
Needless to say, I'm now copying the data to ZFS, and before tomorrow, these two disks will be a new ZFS pool.
@stefano I honestly can't believe how these sorts of issues can keep cropping up with btrfs even today. A hard system shutdown or reboot is an undesirable but certainly by no means uncommon event. And btrfs certainly has all the elements that would *enable* it to handle them gracefully in as close to a guaranteed fashion as one can reasonably get. To say nothing of *one* disk in a redundant array having bad data requiring physical intervention to get to a working state... yikes!
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Don't forget to connect the employee to the UPS, too.
@GustavinoBevilacqua the fun fact is that nobody is admitting it. But the heater is still connected, even if it is off.
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@GustavinoBevilacqua the fun fact is that nobody is admitting it. But the heater is still connected, even if it is off.
The UPS was trying to commit suicide
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@stefano I honestly can't believe how these sorts of issues can keep cropping up with btrfs even today. A hard system shutdown or reboot is an undesirable but certainly by no means uncommon event. And btrfs certainly has all the elements that would *enable* it to handle them gracefully in as close to a guaranteed fashion as one can reasonably get. To say nothing of *one* disk in a redundant array having bad data requiring physical intervention to get to a working state... yikes!
@mkj I agree. Btrfs has its good points but I don't rely on it.
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The UPS was trying to commit suicide
@GustavinoBevilacqua I think they're ready to swear they saw the UPS trying to commit suicide 🤣
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Another data corruption, fortunately not fatal, with btrfs. Two mirrored disks that have little activity. On the same server, Proxmox 9, there is also a ZFS pool (mirrored, more active). Same type of disks.
An employee mistakenly connected an electric heater to a socket protected by the UPS, and the server rebooted brutally.
Upon reboot, one of the two btrfs disks reported:
[ 167.015266] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.017007] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.052517] BTRFS error (device sdd): open_ctree failed mount: /btrfs: can't read superblock on /dev/sdd.Result: unable to mount, even in degraded mode. The only way was to disconnect sdd and mount the other disk in degraded mode.
No issues with the ZFS pool.
Needless to say, I'm now copying the data to ZFS, and before tomorrow, these two disks will be a new ZFS pool.
-
Another data corruption, fortunately not fatal, with btrfs. Two mirrored disks that have little activity. On the same server, Proxmox 9, there is also a ZFS pool (mirrored, more active). Same type of disks.
An employee mistakenly connected an electric heater to a socket protected by the UPS, and the server rebooted brutally.
Upon reboot, one of the two btrfs disks reported:
[ 167.015266] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.017007] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.052517] BTRFS error (device sdd): open_ctree failed mount: /btrfs: can't read superblock on /dev/sdd.Result: unable to mount, even in degraded mode. The only way was to disconnect sdd and mount the other disk in degraded mode.
No issues with the ZFS pool.
Needless to say, I'm now copying the data to ZFS, and before tomorrow, these two disks will be a new ZFS pool.
@stefano These incidents always point to a poorly designed electrical installation where servers are not isolated from other electrical devices to prevent interference, particularly issues caused by harmonics 🤷🏻
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@stefano These incidents always point to a poorly designed electrical installation where servers are not isolated from other electrical devices to prevent interference, particularly issues caused by harmonics 🤷🏻
@ricardo it is. The server is not in a proper room, and isn't protected in the proper way
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undefined oblomov@sociale.network shared this topic
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@ricardo it is. The server is not in a proper room, and isn't protected in the proper way
@stefano Aye, the wise move is, before even checking the computers in an office, to take a look at the electrical panel and see whether there's a super immune RCD ... then you can brace yourself 🫣
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Another data corruption, fortunately not fatal, with btrfs. Two mirrored disks that have little activity. On the same server, Proxmox 9, there is also a ZFS pool (mirrored, more active). Same type of disks.
An employee mistakenly connected an electric heater to a socket protected by the UPS, and the server rebooted brutally.
Upon reboot, one of the two btrfs disks reported:
[ 167.015266] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.017007] BTRFS error (device sdd): parent transid verify failed on 873906176 wanted 998679 found 998677
[ 167.052517] BTRFS error (device sdd): open_ctree failed mount: /btrfs: can't read superblock on /dev/sdd.Result: unable to mount, even in degraded mode. The only way was to disconnect sdd and mount the other disk in degraded mode.
No issues with the ZFS pool.
Needless to say, I'm now copying the data to ZFS, and before tomorrow, these two disks will be a new ZFS pool.
@stefano what would explain that a low activity fs would get wrecked this way… sounds weird; unless btrfs keeps things in memory and never go sync.
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@stefano what would explain that a low activity fs would get wrecked this way… sounds weird; unless btrfs keeps things in memory and never go sync.
@joel I don't know. The disk isn't broken and the other disk (they're in mirror mode) is fine.
This has already happened to me a couple of times. Unpredictable but, at this point, not unexpected.
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