[LU-10520] Cannot format large MDT with ldiskfs

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.11.0
• Affects Version/s: Lustre 2.10.0, Lustre 2.11.0
• Severity: 3
• Assignee: Yang Sheng
• Reporter: Joe Grund

Description

Taken from: https://github.com/intel-hpdd/intel-manager-for-lustre/issues/450

 

Description

When trying to create a MDT on a 29TB volume, the mke2fs command receive ^extents instead of extents which cause the command to fails.

Repro

 

Create an MDT on a large LUN.

 

modprobe osd_ldiskfs: 0


mkfs.lustre --mdt --mgsnode=172.21.61.200@tcp0 --mgsnode=172.21.61.206@tcp0 --failnode=172.21.61.200@tcp0 --reformat --index=0 --mkfsoptions=-I 512 -i 2048 -J size=2048 --backfstype=ldiskfs --fsname=BIGSI01 /dev/mapper/mpathb: 1

   Permanent disk data:
Target:     BIGSI01:MDT0000
Index:      0
Lustre FS:  BIGSI01
Mount type: ldiskfs
Flags:      0x61
              (MDT first_time update )
Persistent mount opts: user_xattr,errors=remount-ro
Parameters:  mgsnode=172.21.61.200@tcp:172.21.61.206@tcp failover.node=172.21.61.200@tcp

device size = 30501008MB
formatting backing filesystem ldiskfs on /dev/mapper/mpathb
	target name   BIGSI01:MDT0000
	4k blocks     7808258048
	options       -I 512 -i 2048 -J size=2048 -q -O dirdata,uninit_bg,^extents,mmp,dir_nlink,quota,huge_file,64bit,flex_bg -E lazy_journal_init -F
mkfs_cmd = mke2fs -j -b 4096 -L BIGSI01:MDT0000 -I 512 -i 2048 -J size=2048 -q -O dirdata,uninit_bg,^extents,mmp,dir_nlink,quota,huge_file,64bit,flex_bg -E lazy_journal_init -F /dev/mapper/mpathb 7808258048
   Found a gpt partition table in /dev/mapper/mpathb
   Extents MUST be enabled for a 64-bit filesystem.  Pass -O extents to rectify.


mkfs.lustre FATAL: Unable to build fs /dev/mapper/mpathb (256)

mkfs.lustre FATAL: mkfs failed 256
 

If I manually try the command and remove the "^" character, the command succeeds.

Issue Links

• is duplicated by: LU-12196 mkfs.lustre should handle large MDTs properly