XFS(5) XFS(5) (NAME) xfs - XFS (DESCRIPTION) (Allocation Groups) XFS . XFS (Logical Volume) . XFS : (Data section) (Log section) (Realtime section). mkfs.xfs(8) () . . mkfs.xfs(8) -b . ( ) ( ) . (Allocation Groups) . mkfs.xfs(8) . (Parallelism) . . CPU . xfs_growfs(8) ( ) . ( ) . (Mount) . (Crash) . (Realtime) . xfsctl(3) . (Extent) ( mkfs.xfs(8)) . . . (Superblock) . mkfs.xfs(8) . . (Header) . XFS (UUID) . UUID XFS dd(1) XFS . XFS UUID xfsdump(8) . xfsdump(8) xfsrestore(8) XFS . (OPERATIONS) XFS xfsctl(3) ( open_by_handle(3) ) . (MOUNT OPTIONS) XFS (Mount) XFS . mount(8) . allocsize=size / . ( 4KiB) 1GiB . . allocsize . attr2|noattr2 : v5.10 (Deprecated) noattr2 attr2 . <<>> / . attr2 ( ) . attr2 . . CRC attr2 noattr2 . dax=value CPU (DAX) . : "dax=inode" DAX FS_XFLAG_DAX . "dax=never" DAX FS_XFLAG_DAX . "dax=always" DAX FS_XFLAG_DAX . DAX dax=inode . DAX filesystems/dax.txt . discard|nodiscard / . SSD (Thinly provisioned LUNs) . : discard fstrim . nodiscard . grpid|bsdgroups|nogrpid|sysvgroups (GID) . grpid fsgid setgid GID setgid . filestreams (Filestreams) . ikeep|noikeep : v5.10 noikeep ikeep . ikeep XFS . noikeep . noikeep . inode32|inode64 inode32 XFS . inode64 XFS . inode32 . inode32 . v3.7 inode64 . largeio|nolargeio "nolargeio" / st_blksize stat(2) / // . (Page cache) . "largeio" "swidth" swidth ( ) st_blksize . swidth "allocsize" allocsize ( ) . "nolargeio" . nolargeio . logbufs=value () . . . . logbsize . logbsize=value . (KiB) "k" . 16384 (value=16k) 32768 (value=32k). 65536 (value=64k) 131072 (value=128k) 262144 (value=256k) . logbsize (Log stripe unit) mkfs . max(32768, log_sunit) . logdev=device rtdev=device ( ) / . XFS : . . noalign (Stripe unit) . (sunit, swidth) mkfs . norecovery . (Unmount) "norecovery" . . "norecovery" . nouuid UUID . LVM "norecovery" . noquota (Quota) . uquota/usrquota/quota/uqnoenforce/qnoenforce ( ) . xfs_quota(8) . gquota/grpquota/gqnoenforce ( ) . xfs_quota(8) . pquota/prjquota/pqnoenforce ( ) . xfs_quota(8) . sunit=value swidth=value (Stripe unit) (Stripe width) RAID . "value" . . sunit swidth . sunit . swidth sunit . RAID RAID5 LUN (Reshaping) . swalloc . wsync (Synchronous) . ( create unlink ) . (HA) . (REMOVED MOUNT OPTIONS) . (Deprecated) . ---- ------- delaylog/nodelaylog v4.0 ihashsize v4.0 irixsgid v4.0 osyncisdsync/osyncisosync v4.0 barrier/nobarrier v4.19 (FILE ATTRIBUTES) XFS chattr(1) : a - (Append only) A - (No atime updates) d - (No dump) i - (Immutable) S - (Synchronous updates) chattr(1) . (SEE ALSO) chattr(1), xfsctl(3), mount(8), mkfs.xfs(8), xfs_info(8), xfs_admin(8), xfsdump(8), xfsrestore(8). xfsprogs XFS(5)