It doesn't need replaced disk to be readable, right? Then what prevents same
procedure to work without a spare bay?
--
With Best Regards,
Marat Khalili
On September 9, 2017 1:29:08 PM GMT+03:00, Patrik Lundquist
<patrik.lundqu...@gmail.com> wrote:
>On 9 September 2017 at 12:05, Marat Khalili <m...@rqc.ru> wrote:
>> Forgot to add, I've got a spare empty bay if it can be useful here.
>
>That makes it much easier since you don't have to mount it degraded,
>with the risks involved.
>
>Add and partition the disk.
>
># btrfs replace start /dev/sdb7 /dev/sdc(?)7 /mnt/data
>
>Remove the old disk when it is done.
>
>> --
>>
>> With Best Regards,
>> Marat Khalili
>>
>> On September 9, 2017 10:46:10 AM GMT+03:00, Marat Khalili
><m...@rqc.ru> wrote:
>>>Dear list,
>>>
>>>I'm going to replace one hard drive (partition actually) of a btrfs
>>>raid1. Can you please spell exactly what I need to do in order to get
>>>my
>>>filesystem working as RAID1 again after replacement, exactly as it
>was
>>>before? I saw some bad examples of drive replacement in this list so
>I
>>>afraid to just follow random instructions on wiki, and putting this
>>>system out of action even temporarily would be very inconvenient.
>>>
>>>For this filesystem:
>>>
>>>> $ sudo btrfs fi show /dev/sdb7
>>>> Label: 'data' uuid: 37d3313a-e2ad-4b7f-98fc-a01d815952e0
>>>> Total devices 2 FS bytes used 106.23GiB
>>>> devid 1 size 2.71TiB used 126.01GiB path /dev/sda7
>>>> devid 2 size 2.71TiB used 126.01GiB path /dev/sdb7
>>>> $ grep /mnt/data /proc/mounts
>>>> /dev/sda7 /mnt/data btrfs
>>>> rw,noatime,space_cache,autodefrag,subvolid=5,subvol=/ 0 0
>>>> $ sudo btrfs fi df /mnt/data
>>>> Data, RAID1: total=123.00GiB, used=104.57GiB
>>>> System, RAID1: total=8.00MiB, used=48.00KiB
>>>> Metadata, RAID1: total=3.00GiB, used=1.67GiB
>>>> GlobalReserve, single: total=512.00MiB, used=0.00B
>>>> $ uname -a
>>>> Linux host 4.4.0-93-generic #116-Ubuntu SMP Fri Aug 11 21:17:51 UTC
>>>> 2017 x86_64 x86_64 x86_64 GNU/Linux
>>>
>>>I've got this in dmesg:
>>>
>>>> [Sep 8 20:31] ata6.00: exception Emask 0x0 SAct 0x7ecaa5ef SErr 0x0
>>>> action 0x0
>>>> [ +0.000051] ata6.00: irq_stat 0x40000008
>>>> [ +0.000029] ata6.00: failed command: READ FPDMA QUEUED
>>>> [ +0.000038] ata6.00: cmd 60/70:18:50:6c:f3/00:00:79:00:00/40 tag
>3
>>>> ncq 57344 in
>>>> res 41/40:00:68:6c:f3/00:00:79:00:00/40
>Emask
>>>> 0x409 (media error) <F>
>>>> [ +0.000094] ata6.00: status: { DRDY ERR }
>>>> [ +0.000026] ata6.00: error: { UNC }
>>>> [ +0.001195] ata6.00: configured for UDMA/133
>>>> [ +0.000030] sd 6:0:0:0: [sdb] tag#3 FAILED Result:
>hostbyte=DID_OK
>>>> driverbyte=DRIVER_SENSE
>>>> [ +0.000005] sd 6:0:0:0: [sdb] tag#3 Sense Key : Medium Error
>>>> [current] [descriptor]
>>>> [ +0.000004] sd 6:0:0:0: [sdb] tag#3 Add. Sense: Unrecovered read
>>>> error - auto reallocate failed
>>>> [ +0.000005] sd 6:0:0:0: [sdb] tag#3 CDB: Read(16) 88 00 00 00 00
>00
>>>
>>>> 79 f3 6c 50 00 00 00 70 00 00
>>>> [ +0.000003] blk_update_request: I/O error, dev sdb, sector
>>>2045996136
>>>> [ +0.000047] BTRFS error (device sda7): bdev /dev/sdb7 errs: wr 0,
>>>rd
>>>> 1, flush 0, corrupt 0, gen 0
>>>> [ +0.000062] BTRFS error (device sda7): bdev /dev/sdb7 errs: wr 0,
>>>rd
>>>> 2, flush 0, corrupt 0, gen 0
>>>> [ +0.000077] ata6: EH complete
>>>
>>>There's still 1 in Current_Pending_Sector line of smartctl output as
>of
>>>
>>>now, so it probably won't heal by itself.
>>>
>>>--
>>>
>>>With Best Regards,
>>>Marat Khalili
>>>--
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