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System Administration Guide: Devices and File Systems

ProcedureHow to Expand a Multiterabyte UFS File System

After a multiterabyte UFS file system is created, you can use the growfs command to expand the file system. For example, using the file system that was created for the volume in the preceding procedure, you can add another disk to this volume. Then, expand the file system.

Steps

  1. Become superuser.

  2. Add another disk to the volume.

    For example:


    # metattach d99 c4t5d0s4
d99: component is attached
# metastat
d99: Concat/Stripe
    Size: 5145882624 blocks (2.4 TB)
    Stripe 0:
        Device     Start Block  Dbase   Reloc
        c0t1d0s4      36864     Yes     Yes
    Stripe 1:
        Device     Start Block  Dbase   Reloc
        c3t7d0s4          0     No      Yes
    Stripe 2:
        Device     Start Block  Dbase   Reloc
        c1t1d0s4          0     No      Yes
    Stripe 3:
        Device     Start Block  Dbase   Reloc
        c4t5d0s4          0     No      Yes

  3. Expand the file system.

    For example:


    # growfs -v /dev/md/rdsk/d99
/usr/lib/fs/ufs/mkfs -G /dev/md/rdsk/d99 5145882624
/dev/md/rdsk/d99:    5145882624 sectors in 837546 cylinders of 48 tracks, 
128 sectors
        2512638.0MB in 5857 cyl groups (143 c/g, 429.00MB/g, 448 i/g)
super-block backups (for fsck -F ufs -o b=#) at:
 32, 878752, 1757472, 2636192, 3514912, 4393632, 5272352, 6151072, 702...
Initializing cylinder groups:
.........................................................................
super-block backups for last 10 cylinder groups at:
 5137130400, 5138009120, 5138887840, 5139766560, 5140645280, 5141524000,
 5142402720, 5143281440, 5144160160, 5145038880,
#

  4. Mount and verify the expanded file system.

    For example:


    # mount /dev/md/dsk/d99 /bigdir
# df -h /bigdir 
Filesystem             size   used  avail capacity  Mounted on 
/dev/md/dsk/d99        2.4T    64M   2.4T     1%    /bigdir