SW RAID 1 na RH-6.2 en

[Igor Bujna]

On 14 Apr 00, at 10:18, Vaclav Dusek wrote:

> Hi,
> 
> poprve zapasim s RAIDem na Linuxu.
> 
> Na nove masine (syst. disk na IDE a 2x SCSI) bych chtel na SCSI discich
> rozjet Raid-1
> 
> Myslim si, ze podporu SCSI a Raidu mam OK - viz vypis dmesg:
> 
> md driver 0.36.6 MAX_MD_DEV=4, MAX_REAL=8
> linear personality registered
> raid0 personality registered
> raid1 personality registered
> raid5 personality registered
> (scsi0) <Adaptec AIC-7895 Ultra SCSI host adapter> found at PCI 12/0
> (scsi0) Wide Channel A, SCSI ID=7, 32/255 SCBs
> (scsi0) Downloading sequencer code... 374 instructions downloaded
> (scsi1) <Adaptec AIC-7895 Ultra SCSI host adapter> found at PCI 12/1
> (scsi1) Wide Channel B, SCSI ID=7, 32/255 SCBs
> (scsi1) Downloading sequencer code... 374 instructions downloaded
> scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.21/3.2.4
>        <Adaptec AIC-7895 Ultra SCSI host adapter>
> scsi1 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.21/3.2.4
>        <Adaptec AIC-7895 Ultra SCSI host adapter>
> scsi : 2 hosts.
> (scsi0:0:1:0) Synchronous at 40.0 Mbyte/sec, offset 8.
>   Vendor: IBM       Model: DNES-318350W      Rev: SA30
>   Type:   Direct-Access                      ANSI SCSI revision: 03
> Detected scsi disk sda at scsi0, channel 0, id 1, lun 0
> (scsi0:0:2:0) Synchronous at 40.0 Mbyte/sec, offset 8.
>   Vendor: IBM       Model: DNES-318350W      Rev: SA30
>   Type:   Direct-Access                      ANSI SCSI revision: 03
> Detected scsi disk sdb at scsi0, channel 0, id 2, lun 0
> scsi : detected 2 SCSI disks total.
> SCSI device sda: hdwr sector= 512 bytes. Sectors= 35843670 [17501 MB]
> [17.5 GB]
> SCSI device sdb: hdwr sector= 512 bytes. Sectors= 35843670 [17501 MB]
> [17.5 GB] 
> 
> 
> Oba SCSI disky maji typ fd na cele partition (prikaz fd /dev/sda resp.
> /dev/sdb)
> 
> Soubor /etc/raidtab vypada nasledovne
> [root na bubu .mc]# cat /etc/raidtab
> raiddev /dev/md0
>     raid-level                  1
>     nr-raid-disks               2
>     nr-spare-disks              0
>     chunk-size                  4
>     persistent-superblock       1
>     device                      /dev/sda1
>     raid-disk                   0
>     device                      /dev/sdb1
>     raid-disk                   1         
> 
> 
> Pokud zadam mkraid /dev/md0
> 
> [root na bubhandling MD device /dev/md0
> analyzing super-block
> disk 0: /dev/sda1, 17920507kB, raid superblock at 17920384kB
> disk 1: /dev/sdb1, 17920507kB, raid superblock at 17920384kB
> mkraid: aborted, see the syslog and /proc/mdstat for potential clues.
> 
> V syslogu nic neni a v mdstat je nasledujici:
> 
> 
Zkuste mkraid --force /dev/md0