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Привет. Был один раздел на 4х физических дисках под btrfs, созданный так: # mkfs.btrfs /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdb резко умер: btrfs filesystem show Label: none uuid: ef27b935-d4ba-41a3-9e7e-60362329d658 Total devices 1 FS bytes used 25.54GiB devid 1 size 40.01GiB used 27.03GiB path /dev/sda2 Label: none uuid: bf111756-1eb0-4aeb-bd54-3ffd42ed5a3a Total devices 1 FS bytes used 68.34GiB devid 1 size 69.78GiB used 69.78GiB path /dev/sda3 warning, device 1 is missing warning, device 1 is missing Label: none uuid: ddb0fd1f-1bf1-41ac-b808-8892b36e5c07 Total devices 4 FS bytes used 3.59TiB devid 2 size 1.82TiB used 1.81TiB path /dev/sdc devid 3 size 1.82TiB used 1.81TiB path /dev/sde devid 4 size 1.82TiB used 1.81TiB path /dev/sdd *** Some devices missing Притащил другой, воткнул, и: mount -o degraded /dev/sdc /media/raid1 mount: /media/raid1: wrong fs type, bad option, bad superblock on /dev/sdc, missing codepage or helper program, or other error. Понятно, делаю: btrfsck /dev/sdc Opening filesystem to check... warning, device 1 is missing warning, device 1 is missing Checking filesystem on /dev/sdc UUID: ddb0fd1f-1bf1-41ac-b808-8892b36e5c07 [1/7] checking root items [2/7] checking extents [3/7] checking free space cache [4/7] checking fs roots [5/7] checking only csums items (without verifying data) [6/7] checking root refs [7/7] checking quota groups skipped (not enabled on this FS) found 3947044032512 bytes used, no error found total csum bytes: 3849158660 total tree bytes: 4550115328 total fs tree bytes: 86999040 total extent tree bytes: 30982144 btree space waste bytes: 440883716 file data blocks allocated: 394 и ещё: btrfs inspect-internal dump-super -a /dev/sdc superblock: bytenr=65536, device=/dev/sdc --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0xc97fe9b8 [match] bytenr 65536 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid ddb0fd1f-1bf1-41ac-b808-8892b36e5c07 label generation 302435 root 1840939008 sys_array_size 290 chunk_root_generation 237683 root_level 1 chunk_root 20971520 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 8001595736064 bytes_used 3947044032512 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 4 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x161 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 302435 uuid_tree_generation 302435 dev_item.uuid a6053590-2e93-457e-a0b4-9cf11ef73dd1 dev_item.fsid ddb0fd1f-1bf1-41ac-b808-8892b36e5c07 [match] dev_item.type 0 dev_item.total_bytes 2000398934016 dev_item.bytes_used 1996082970624 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 superblock: bytenr=67108864, device=/dev/sdc --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0x691ec176 [match] bytenr 67108864 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid ddb0fd1f-1bf1-41ac-b808-8892b36e5c07 label generation 302435 root 1840939008 sys_array_size 290 chunk_root_generation 237683 root_level 1 chunk_root 20971520 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 8001595736064 bytes_used 3947044032512 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 4 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x161 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 302435 uuid_tree_generation 302435 dev_item.uuid a6053590-2e93-457e-a0b4-9cf11ef73dd1 dev_item.fsid ddb0fd1f-1bf1-41ac-b808-8892b36e5c07 [match] dev_item.type 0 dev_item.total_bytes 2000398934016 dev_item.bytes_used 1996082970624 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 superblock: bytenr=274877906944, device=/dev/sdc --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0x94999747 [match] bytenr 274877906944 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid ddb0fd1f-1bf1-41ac-b808-8892b36e5c07 label generation 302435 root 1840939008 sys_array_size 290 chunk_root_generation 237683 root_level 1 chunk_root 20971520 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 8001595736064 bytes_used 3947044032512 sectorsize 4096 nodesize 16384 leafsize (deprecated) 16384 stripesize 4096 root_dir 6 num_devices 4 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x161 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF | SKINNY_METADATA ) cache_generation 302435 uuid_tree_generation 302435 dev_item.uuid a6053590-2e93-457e-a0b4-9cf11ef73dd1 dev_item.fsid ddb0fd1f-1bf1-41ac-b808-8892b36e5c07 [match] dev_item.type 0 dev_item.total_bytes 2000398934016 dev_item.bytes_used 1996082970624 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 и dmesg: [ 141.082051] BTRFS info (device sdc): disk space caching is enabled [ 141.082053] BTRFS info (device sdc): has skinny extents [ 141.082432] BTRFS error (device sdc): devid 1 uuid d40e530b-8188-44b0-8c03-4a96b563d20c is missing [ 141.082437] BTRFS error (device sdc): failed to read the system array: -2 [ 141.103072] BTRFS error (device sdc): open_ctree failed ....... [ 5012.996164] BTRFS error (device sdc): open_ctree failed [ 5292.346631] BTRFS info (device sdc): allowing degraded mounts [ 5292.346634] BTRFS info (device sdc): disk space caching is enabled [ 5292.346635] BTRFS info (device sdc): has skinny extents [ 5292.347595] BTRFS warning (device sdc): devid 1 uuid d40e530b-8188-44b0-8c03-4a96b563d20c is missing [ 5294.883873] BTRFS warning (device sdc): chunk 0 missing 1 devices, max tolerance is 0 for writeable mount [ 5294.883875] BTRFS warning (device sdc): writeable mount is not allowed due to too many missing devices [ 5294.913899] BTRFS error (device sdc): open_ctree failed Не монтируется даже в degraded... А чтобы мне добавить / убавить диск в раздел, его блин, нужно смонтировать... Я в btrfs не алё, буду рад помощи, а то писец какой то... Спасибо.