Thanks Henk,
That's encouraging and what I suspected - everything looks fine (even some bitrot picked up through read error corrections on checksum failures, hurray!) and yes I'll resize the new device once it completes.
[root@array ~]# btrfs replace status -1 /export/archive/
547.9% done, 0 write errs, 0 uncorr. read errs
'btrfs filesystem usage' is nifty however also doesn't provide any hints as to progress; the replace operation is from /dev/sdb to /dev/sdj and if the Data value for /dev/sdb was gradually reducing it would make more sense, however it appears the entire operation needs to complete before the source device shows as <device size> unallocated and the destination device shows the same amount of moved chunks. Maybe that's intended due to RAID1 layout (i.e. per subvolume and not per file).
[root@array ~]# btrfs fi usage /export/archive/
Overall:
Device size: 46.39TiB
Device allocated: 41.84TiB
Device unallocated: 4.55TiB
Device missing: 0.00B
Used: 41.30TiB
Free (estimated): 2.55TiB (min: 2.55TiB)
Data ratio: 2.00
Metadata ratio: 2.00
Global reserve: 512.00MiB (used: 0.00B)
Data,RAID1: Size:20.90TiB, Used:20.63TiB
/dev/sdb 4.55TiB
/dev/sdc 5.45TiB
/dev/sdd 5.46TiB
/dev/sde 5.46TiB
/dev/sdf 5.45TiB
/dev/sdg 5.45TiB
/dev/sdh 4.55TiB
/dev/sdi 5.45TiB
Metadata,single: Size:8.00MiB, Used:0.00B
/dev/sdc 8.00MiB
Metadata,RAID1: Size:23.00GiB, Used:22.14GiB
/dev/sdb 1.00GiB
/dev/sdc 10.00GiB
/dev/sdd 1.00GiB
/dev/sdf 11.00GiB
/dev/sdg 11.00GiB
/dev/sdh 1.00GiB
/dev/sdi 11.00GiB
System,single: Size:4.00MiB, Used:0.00B
/dev/sdc 4.00MiB
System,RAID1: Size:8.00MiB, Used:2.91MiB
/dev/sdf 8.00MiB
/dev/sdg 8.00MiB
Unallocated:
/dev/sdb 1.02MiB
/dev/sdc 5.02MiB
/dev/sdd 1.02MiB
/dev/sde 1.02MiB
/dev/sdf 1.02MiB
/dev/sdg 1.02MiB
/dev/sdh 1.02MiB
/dev/sdi 1.02MiB
/dev/sdj 4.55TiB
[root@array ~]#
Here's hoping a dev can make the necessary adjustments to improve the status output .. thanks again !
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