| 1 | [nixos@nixos:~]$ sudo bcachefs show-super /dev/sda
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| 2 | Device: Samsung SSD 860
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| 3 | External UUID: becc93fe-5efb-4d02-9fcc-f0ce0b23a7c8
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| 4 | Internal UUID: 5ab21e3e-9622-4082-975c-d060d674a340
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| 5 | Magic number: c68573f6-66ce-90a9-d96a-60cf803df7ef
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| 6 | Device index: 3
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| 7 | Label: (none)
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| 8 | Version: 1.20: directory_size
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| 9 | Incompatible features allowed: 0.0: (unknown version)
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| 10 | Incompatible features in use: 0.0: (unknown version)
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| 11 | Version upgrade complete: 1.13: inode_has_child_snapshots
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| 12 | Oldest version on disk: 1.12: rebalance_work_acct_fix
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| 13 | Created: Sun Dec 1 10:49:02 2024
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| 14 | Sequence number: 268
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| 15 | Time of last write: Sat May 3 18:26:25 2025
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| 16 | Superblock size: 5.34 KiB/1.00 MiB
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| 17 | Clean: 1
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| 18 | Devices: 4
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| 19 | Sections: members_v1,crypt,replicas_v0,disk_groups,clean,journal_seq_blacklist,journal_v2,counters,members_v2,errors,ext,downgrade
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| 20 | Features: zstd,journal_seq_blacklist_v3,reflink,new_siphash,inline_data,new_extent_overwrite,btree_ptr_v2,extents_above_btree_updates,btree_updates_journalled,reflink_inline_data,new_varint,journal_no_flush,alloc_v2,extents_across_btree_nodes
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| 21 | Compat features: alloc_info,alloc_metadata,extents_above_btree_updates_done,bformat_overflow_done
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| 22 |
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| 23 | Options:
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| 24 | block_size: 4.00 KiB
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| 25 | btree_node_size: 256 KiB
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| 26 | errors: continue [fix_safe] panic ro
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| 27 | write_error_timeout: 30
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| 28 | metadata_replicas: 2
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| 29 | data_replicas: 2
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| 30 | metadata_replicas_required: 1
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| 31 | data_replicas_required: 1
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| 32 | encoded_extent_max: 64.0 KiB
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| 33 | metadata_checksum: none [crc32c] crc64 xxhash
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| 34 | data_checksum: none [crc32c] crc64 xxhash
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| 35 | checksum_err_retry_nr: 3
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| 36 | compression: none
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| 37 | background_compression: zstd
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| 38 | str_hash: crc32c crc64 [siphash]
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| 39 | metadata_target: none
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| 40 | foreground_target: ssd
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| 41 | background_target: hdd
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| 42 | promote_target: ssd
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| 43 | erasure_code: 0
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| 44 | inodes_32bit: 1
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| 45 | shard_inode_numbers_bits: 2
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| 46 | inodes_use_key_cache: 1
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| 47 | gc_reserve_percent: 8
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| 48 | gc_reserve_bytes: 0 B
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| 49 | root_reserve_percent: 0
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| 50 | wide_macs: 0
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| 51 | promote_whole_extents: 1
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| 52 | acl: 1
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| 53 | usrquota: 0
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| 54 | grpquota: 0
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| 55 | prjquota: 0
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| 56 | degraded: [ask] yes very no
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| 57 | journal_flush_delay: 1000
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| 58 | journal_flush_disabled: 0
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| 59 | journal_reclaim_delay: 100
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| 60 | journal_transaction_names: 1
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| 61 | allocator_stuck_timeout: 30
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| 62 | version_upgrade: [compatible] incompatible none
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| 63 | nocow: 0
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| 64 |
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| 65 | members_v2 (size 592):
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| 66 | Device: 0
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| 67 | Label: hdd1 (1)
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| 68 | UUID: 3bc05e7a-81d9-4b88-ac83-dcc20ba85d7b
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| 69 | Size: 16.4 TiB
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| 70 | read errors: 0
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| 71 | write errors: 0
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| 72 | checksum errors: 0
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| 73 | seqread iops: 0
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| 74 | seqwrite iops: 0
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| 75 | randread iops: 0
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| 76 | randwrite iops: 0
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| 77 | Bucket size: 256 KiB
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| 78 | First bucket: 0
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| 79 | Buckets: 68665344
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| 80 | Last mount: Sat May 3 18:26:25 2025
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| 81 | Last superblock write: 268
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| 82 | State: rw
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| 83 | Data allowed: journal,btree,user
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| 84 | Has data: journal,btree,user
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| 85 | Btree allocated bitmap blocksize: 512 MiB
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| 86 | Btree allocated bitmap: 0000000000000000000000000100000000000000000000000000000100000001
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| 87 | Durability: 1
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| 88 | Discard: 0
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| 89 | Freespace initialized: 1
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| 90 | Resize on mount: 0
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| 91 | Device: 1
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| 92 | Label: hdd2 (2)
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| 93 | UUID: a2b11511-4ccd-4f1b-8341-3ce90c251aad
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| 94 | Size: 16.4 TiB
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| 95 | read errors: 0
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| 96 | write errors: 0
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| 97 | checksum errors: 0
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| 98 | seqread iops: 0
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| 99 | seqwrite iops: 0
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| 100 | randread iops: 0
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| 101 | randwrite iops: 0
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| 102 | Bucket size: 256 KiB
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| 103 | First bucket: 0
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| 104 | Buckets: 68665344
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| 105 | Last mount: Sat May 3 18:26:25 2025
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| 106 | Last superblock write: 268
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| 107 | State: rw
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| 108 | Data allowed: journal,btree,user
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| 109 | Has data: journal,btree,user
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| 110 | Btree allocated bitmap blocksize: 128 MiB
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| 111 | Btree allocated bitmap: 0000000000000000000000001000000000000000000000000000000000001101
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| 112 | Durability: 1
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| 113 | Discard: 0
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| 114 | Freespace initialized: 1
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| 115 | Resize on mount: 0
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| 116 | Device: 2
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| 117 | Label: ssd1 (4)
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| 118 | UUID: c44f471f-5c96-4370-a0ed-745e9e5248a6
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| 119 | Size: 215 GiB
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| 120 | read errors: 0
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| 121 | write errors: 0
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| 122 | checksum errors: 0
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| 123 | seqread iops: 0
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| 124 | seqwrite iops: 0
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| 125 | randread iops: 0
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| 126 | randwrite iops: 0
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| 127 | Bucket size: 256 KiB
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| 128 | First bucket: 0
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| 129 | Buckets: 880930
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| 130 | Last mount: Sat May 3 18:26:25 2025
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| 131 | Last superblock write: 268
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| 132 | State: rw
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| 133 | Data allowed: journal,btree,user
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| 134 | Has data: cached
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| 135 | Btree allocated bitmap blocksize: 1.00 B
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| 136 | Btree allocated bitmap: 0000000000000000000000000000000000000000000000000000000000000000
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| 137 | Durability: 0
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| 138 | Discard: 1
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| 139 | Freespace initialized: 1
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| 140 | Resize on mount: 0
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| 141 | Device: 3
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| 142 | Label: ssd2 (5)
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| 143 | UUID: 5226b956-3a79-41e2-b29a-40bcceb37707
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| 144 | Size: 932 GiB
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| 145 | read errors: 0
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| 146 | write errors: 0
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| 147 | checksum errors: 0
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| 148 | seqread iops: 0
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| 149 | seqwrite iops: 0
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| 150 | randread iops: 0
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| 151 | randwrite iops: 0
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| 152 | Bucket size: 256 KiB
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| 153 | First bucket: 0
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| 154 | Buckets: 3815478
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| 155 | Last mount: Sat May 3 18:26:25 2025
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| 156 | Last superblock write: 268
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| 157 | State: rw
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| 158 | Data allowed: journal,btree,user
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| 159 | Has data: cached
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| 160 | Btree allocated bitmap blocksize: 1.00 B
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| 161 | Btree allocated bitmap: 0000000000000000000000000000000000000000000000000000000000000000
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| 162 | Durability: 0
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| 163 | Discard: 1
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| 164 | Freespace initialized: 1
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| 165 | Resize on mount: 0
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| 166 |
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| 167 | errors (size 8):
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| 168 |
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