RAID 1 and mkraid

GaMeS · 03-08-2005, 09:17 AM

i want to morroring the entire disk hda to hdc

Code:

Mar  8 16:28:58 servcd kernel: md: could not bd_claim hda.
Mar  8 16:28:58 servcd kernel: md: error, md_import_device() returned -16

Code:

root@servcd:/# raidstop /dev/md/0
root@servcd:/# mdadm --create /dev/md/0 --level=1 --raid-devices=2 /dev/hda /dev/hdc
mdadm: /dev/hda appears to be part of a raid array:
    level=1 devices=2 ctime=Mon Mar  7 18:02:22 2005
mdadm: /dev/hdc appears to be part of a raid array:
    level=1 devices=2 ctime=Mon Mar  7 16:44:51 2005
Continue creating array? yes
VERS = 9001
mdadm: ADD_NEW_DISK for /dev/hda failed: Device or resource busy
root@servcd:/#

jiawj · 03-08-2005, 11:05 AM

first, you should change the partition format from swap to Linux raid auto

then

mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/hda /dev/hdc

Quote:

/dev/hda is specified the whole disk,you should make partitions by fdisk

that is my fault, sorry!! you can build mirror disk without partition.

but I think you should build a partition and specify format is Linux raid auto as well.

GaMeS · 03-09-2005, 01:12 AM

my first hdd (where i have data and system)

Code:

cfdisk 2.12p

                                            Disk Drive: /dev/hda
                                     Size: 160041885696 bytes, 160.0 GB
                           Heads: 255   Sectors per Track: 63   Cylinders: 19457

     Name            Flags          Part Type      FS Type               [Label]             Size (MB)
 ----------------------------------------------------------------------------------------------------------
     hda1                            Primary       Linux raid autodetect                       1019.94
     hda2            Boot            Primary       Linux raid autodetect                      50001.48
     hda3                            Primary       Linux raid autodetect                      29997.60
     hda4                            Primary       Linux raid autodetect                      79020.27

my blank hdd

Code:

 Disk Drive: /dev/hdc
                                     Size: 160041885696 bytes, 160.0 GB
                           Heads: 255   Sectors per Track: 63   Cylinders: 19457

     Name            Flags          Part Type      FS Type               [Label]             Size (MB)
 ----------------------------------------------------------------------------------------------------------
                                     Pri/Log       Free Space                                160039.28

on the startup with Linux raid autodetect

'dmesg'

Code:

md: Autodetecting RAID arrays.
md: invalid raid superblock magic on hda2
md: hda2 has invalid sb, not importing!
md: invalid raid superblock magic on hda3
md: hda3 has invalid sb, not importing!
md: invalid raid superblock magic on hda4
md: hda4 has invalid sb, not importing!
md: autorun ...
md: considering hda1 ...
md:  adding hda1 ...
md: created md0
md: bind<hda1>
md: running: <hda1>
md: md0: raid array is not clean -- starting background reconstruction
raid1: raid set md0 active with 1 out of 2 mirrors
md: ... autorun DONE.

'cat /proc/mdstat'

Code:

root@servcd:~# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid5] [raid6] [raid10] [faulty]
md0 : active raid1 hda1[0]
      995904 blocks [2/1] [U_]

unused devices: <none>

hmm , the raid don't sync hdd.... and i think raid don't work..?
but the solution is not far....

my raidtab if you want...

Code:

# md device [dev 9, 0] /dev/md0 queried offline
# Authoritative device is [dev 22, 0] /dev/hdc
        raiddev /dev/md0
        raid-level              1
        nr-raid-disks           2
        nr-spare-disks          0
        chunk-size              32
        device          /dev/hda
        raid-disk               0
        device          /dev/hdc
        raid-disk               1

Quote:

but I think you should build a partition and specify format is Linux raid auto as well.

hum for hda ? and create partition on hdc with Linux raid auto type ?