Dear Anand, thank you for your help. > On December 10, 2014 at 3:46 AM Anand Jain <[email protected]> wrote: > It depends on the disk that is read first, you could read super block > using btrfs-show-super and check if num_device.
I checked this for all three devices and num_devices is 4 for all of them. The full output is below. > It may fail if you are mounting more than one subvol during boot and if > you don't have this patch. > > commit 0f23ae74f589304bf33233f85737f4fd368549eb > Author: Chris Mason <[email protected]> > Date: Thu Sep 18 07:49:05 2014 -0700 > > Revert "Btrfs: device_list_add() should not update list when mounted" > > This reverts commit b96de000bc8bc9688b3a2abea4332bd57648a49f. I am running 3.18-rc5+ from linus tree. If I am not mistaken, that commit is his tree in since 3.17-rc6. So I guess the question is: Why does the superblock say num_devices=4 (and how do I fix it)? Or am I misunderstanding the problem? Best regards, Florian root@oot:/home/shared# btrfs-show-super /dev/sdb superblock: bytenr=65536, device=/dev/sdb --------------------------------------------------------- csum 0x55a3eb1d [match] bytenr 65536 flags 0x1 magic _BHRfS_M [match] fsid be2b3499-7452-4b91-b664-4ec4d7ff62b9 label generation 3003 root 441395970048 sys_array_size 129 chunk_root_generation 3001 root_level 1 chunk_root 442469761024 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 109927469in the first place8752 bytes_used 160703954944 sectorsize 4096 nodesize 16384 leafsize 16384 stripesize 4096 root_dir 6 num_devices 4 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x61 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF ) csum_type 0 csum_size 4 cache_generation 3003 uuid_tree_generation 3003 dev_item.uuid 5b8c8d20-c330-48a2-814c-c6986b787d52 dev_item.fsid be2b3499-7452-4b91-b664-4ec4d7ff62b9 [match] dev_item.type 0 dev_item.total_bytes 500107862016 dev_item.bytes_used 162168569856 dev_item.io_align 4096 dev_item.io_width 4096 dev_item.sector_size 4096 dev_item.devid 2 dev_item.dev_group 0 dev_item.seek_speed 0 dev_item.bandwidth 0 dev_item.generation 0 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
