SW RAID 1 na RH-6.2 en

Vaclav Dusek Vaclav.Dusek na upce.cz
Pátek Duben 14 10:18:45 CEST 2000


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:

/proc]# cat mdstat
Personalities : [1 linear] [2 raid0] [3 raid1] [4 raid5]
read_ahead not set
md0 : inactive
md1 : inactive
md2 : inactive
md3 : inactive


Nevi nekdo z vas, co delam spatne? Diky

-- 
Vaclav Dusek                 e-mail: Vaclav.Dusek na upce.cz
Univerzita Pardubice         tel: 040  / 603 65 00
Studentska 84                     0602 / 35 26 86
532 10 Pardubice             fax: 040  / 603 60 10
**
http://dusek.upce.cz/


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