NEC Express5800/320Fc Manual download pdf (Page 71)

Administering RAID Arrays

Setting Up the ftServer System 5-23

2. Add each partition on the spare disk to the RAID-1 array containing the

corresponding partition on the running disk with commands like the following:

# mdadm -a /dev/md0 /dev/sdd1

mdadm: hot added /dev/sdd1

# mdadm -a /dev/md1 /dev/sdd3

mdadm: hot added /dev/sdd3

# mdadm -a /dev/md2 /dev/sdd2

mdadm: hot added /dev/sdd2

Perform the following procedure only if the running disk is the system disk.

To run GRUB

If the running disk is the system disk, run the GRUB boot loader on the boot partition

of the spare disk, after resynchronization is complete on that partition.

Example 5-4

shows a typical use of GRUB:

Example 5-4. Running GRUB

# /sbin/grub

GNU GRUB version 0.95 (640K lower / 3072K upper memory)

[ Minimal BASH-like line editing is supported. For the first word, TAB

lists possible command completions. Anywhere else TAB lists the possible

completions of a device/filename.]

grub> device (hd0) /dev/sdd

grub> root (hd0,0)

Filesystem type is ext2fs, partition type 0xfd

grub> setup (hd0)

Checking if "/boot/grub/stage1" exists... no

Checking if "/grub/stage1" exists... yes

Checking if "/grub/stage2" exists... yes

Checking if "/grub/e2fs_stage1_5" exists... yes

Running "embed /grub/e2fs_stage1_5 (hd0)"... 16 sectors are embedded.

succeeded

Running "install /grub/stage1 (hd0) (hd0)1+16 p (hd0,0)/grub/stage2

/grub/grub.conf"..

. succeeded

Done.

grub> quit

On your own system, replace the /dev/sdd shown in Example 5-4 with the device

node for your spare disk. In the root (hd0,0) command, the second zero is

thenumber of the partition to GRUB. GRUB partitions are zero-based rather than

one-based, so these commands actually indicate that partition 1 on /dev/sdd has

been GRUBbed.

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NEC Express5800/320Fc Manual Page 71