04-04-2024, 07:39 AM
So, this is the 2nd time in 2 years that I have lost some important data on my Asustor AS6510T
I have 5x 18Tb drives in Raid 5 , Btrfs and 2x 1Tb SSD for caching
First time was in 2022 with during the Deadbolt attack, but the data loss was not due to Deadbolt (although a few less important files), but due to the ADM update to fix it :
- after the attack, the NAS hung for 30mins in the initialization phase, so I couldn't install the ADM update
- removing the SSDs made it start up with the new ADM but did not recognize my Volume 1 (corrupted)
- after trial and error, I put the SSDs back in and it suddenly recognized my Volume 1 again although some files were lost
Last week, I bought 2x extra 18Tb to increase my volume size and upgrade to Raid 6
- I did "safely remove cache" in ADM, but after 30mins, it was still suck on 0%
- So I had no other resort than trying a hard reboot (in hindsight I should have waited for hours, but who would expect a 1Tb SSD flush would take hours..) and that's when my Volume 1 was inaccessible
- I took the SSDs out, rebooted and back in and then it recognized my Volume 1
- I then safely remove my SSDs (this time it took 15mins)
- ADM started immediately a rebuild
- after the rebuild, I got a weird status (see attached pics) :
After the 4 day Quin Ming holidays, Asustor support will investigate my volume, see if any date is lost
In the meantime I bought 4 extra disks to copy all my data to.
Asustor clearly stated : Btrfs in combination with R/W cache can corrupt your disk if the SSDs are removed (or fail)
Now, that I would call a HUGE security risk and as a product manager myself I cannot understand why ADM does not warn the users at all or even better, would restrict the use of R/W cache in combination with Btrfs
After copying my data over, I will probably delete the current volume (crashed 2 times, don't trust it anymore) and create a clean
new volume
So my questions to the forum are :
- Should I use Ext4 instead instead of Btrfs ? Is it really safer ? Strangely enough, the same Asustor support told me Btrfs is fine and is actually a good fs. Really after what they said ??
- I will probably not use Cache (or at least not R/W cache) ever again...
- or should I just get rid of my Asustor and go back to Synology or build a NAS myself with TrueNAS ?
Any tips here ? people with same experiences ?
What would be the safest NAS (Synology, TrueNAS) and safest Filesystem ?
Plz, take into account mirroring is not an option with +60Tb data, but Raid 6 is
I have 5x 18Tb drives in Raid 5 , Btrfs and 2x 1Tb SSD for caching
First time was in 2022 with during the Deadbolt attack, but the data loss was not due to Deadbolt (although a few less important files), but due to the ADM update to fix it :
- after the attack, the NAS hung for 30mins in the initialization phase, so I couldn't install the ADM update
- removing the SSDs made it start up with the new ADM but did not recognize my Volume 1 (corrupted)
- after trial and error, I put the SSDs back in and it suddenly recognized my Volume 1 again although some files were lost
Last week, I bought 2x extra 18Tb to increase my volume size and upgrade to Raid 6
- I did "safely remove cache" in ADM, but after 30mins, it was still suck on 0%
- So I had no other resort than trying a hard reboot (in hindsight I should have waited for hours, but who would expect a 1Tb SSD flush would take hours..) and that's when my Volume 1 was inaccessible
- I took the SSDs out, rebooted and back in and then it recognized my Volume 1
- I then safely remove my SSDs (this time it took 15mins)
- ADM started immediately a rebuild
- after the rebuild, I got a weird status (see attached pics) :
- RAID Level RAID 5 : Drive 1, 2, 3, 4, 5, 5 (2 times 5!!)
- RAID 5, data protection None (Faulty drives tolerated 0), even though I have 5x disks of 16.37 Tb (18Tb) and a total volume capacity of 65.47 Tb.
After the 4 day Quin Ming holidays, Asustor support will investigate my volume, see if any date is lost
In the meantime I bought 4 extra disks to copy all my data to.
Asustor clearly stated : Btrfs in combination with R/W cache can corrupt your disk if the SSDs are removed (or fail)
Now, that I would call a HUGE security risk and as a product manager myself I cannot understand why ADM does not warn the users at all or even better, would restrict the use of R/W cache in combination with Btrfs
After copying my data over, I will probably delete the current volume (crashed 2 times, don't trust it anymore) and create a clean
new volume
So my questions to the forum are :
- Should I use Ext4 instead instead of Btrfs ? Is it really safer ? Strangely enough, the same Asustor support told me Btrfs is fine and is actually a good fs. Really after what they said ??
- I will probably not use Cache (or at least not R/W cache) ever again...
- or should I just get rid of my Asustor and go back to Synology or build a NAS myself with TrueNAS ?
Any tips here ? people with same experiences ?
What would be the safest NAS (Synology, TrueNAS) and safest Filesystem ?
Plz, take into account mirroring is not an option with +60Tb data, but Raid 6 is