August 20, 20178 yr Basically as my title states i am looking to convert my cache storage from raid 0 to raid 1. essentially i have been seeing the odd error creep into one of my ssd's. I have plenty of available space to convert from raid 0 to raid 1. 102gb used out of 720gb (2x120gb & 2x240gb). I have found the commands and just wanted to double check i have it all correct before implementing it and also that all the data should be fine while making this conversion? -dconvert=raid0 -mconvert=raid1 My intention is to eventually buy replacement SSD's (2x500gb samsung 850EVO) to sort out the issues but i just want to stop the cache from being completely unusable before i replace them. Thanks in advance.
August 21, 20178 yr Community Expert Correct command is: -dconvert=raid1 -mconvert=raid1 It's usually a safe operation but it's a good idea to backup any irreplaceable data before beginning.
August 22, 20178 yr Author ok I did it... although I have just gotten an error. Cache pool BTRFS too many profiles Everything seems to be working fine from what i can tell. although strangely the amount of space taken up by the cache is now half what it was while in raid0... any ideas?
August 22, 20178 yr Community Expert 5 hours ago, tazire said: Cache pool BTRFS too many profiles This means not all was converted to raid1, run the same command again, if the error doesn't go away post your diagnostics.
August 22, 20178 yr 7 hours ago, tazire said: ok I did it... although I have just gotten an error. Cache pool BTRFS too many profiles Everything seems to be working fine from what i can tell. although strangely the amount of space taken up by the cache is now half what it was while in raid0... any ideas? This message can appear while conversion is in progress. It has temporarily two profiles: existing and new. Do btrfs filesystem df /mnt/cache To verify only one profile exists. Ps. It is expected that RAID1 is half the size of RAID0 Edited August 22, 20178 yr by bonienl
August 22, 20178 yr Community Expert 1 hour ago, bonienl said: This message can appear while conversion is in progress. It has temporarily two profiles: existing and new. Good point, I assumed he was seeing the error after the conversion, sometimes a second balance it's needed to get rid of the earlier profile.
August 22, 20178 yr Author thanks for the responses lads. you are correct. that error has gone since.
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