aacraid with RHEL2.1 in PowerEdge 2650

shashi shashi.boddula at oracle.com
Tue Dec 19 12:54:54 CST 2006


Hi All,

I am remote administrator, from the past few days i was working with PowerEdge servers where Linux
loaded. Basically, my problem is, i am not able to understand the concept. I feel, i will get some
help from this list.

I have two servers, model is PowerEdge 2650, OS is RHEL 2.1.

On my first server
------------------

[root at abc1 root]# fdisk -l

Disk /dev/sda: 255 heads, 63 sectors, 8924 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/sda1   *         1        16    128488+  83  Linux
/dev/sda2            17       277   2096482+  82  Linux swap
/dev/sda3           278       538   2096482+  82  Linux swap
/dev/sda4           539      8924  67360545    f  Win95 Ext'd (LBA)
/dev/sda5           539      7227  53729361   83  Linux
/dev/sda6          7228      8402   9438156   83  Linux
/dev/sda7          8403      8663   2096451   83  Linux
/dev/sda8          8664      8924   2096451   82  Linux swap

Disk /dev/sdc: 255 heads, 63 sectors, 17847 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/sdc1             1     17847 143355996   83  Linux
[root at abc1 root]#


[root at abc1 root]# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: DELL     Model: root             Rev: V1.0
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: DELL     Model: root mirror      Rev: V1.0
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
  Vendor: DELL     Model: PERC RAID5       Rev: V1.0
  Type:   Direct-Access                    ANSI SCSI revision: 02
[root at abc1 root]#


[root at abc1 root]# lsmod | grep -i aacraid
aacraid                50112  10
scsi_mod              125756   2  [aacraid sd_mod]
[root at abc1 root]#


>From the first server, my observation is , fdisk command is showing 2 volumes, /proc/scsi/scsi
command is showing 3 volumes . I was expecting , since /proc/scsi/scsi command was showing 3 volume
, then fdisk command should show all 3 volumes.


On my second server
--------------------

[root at abc2 root]# fdisk -l

Disk /dev/sda: 255 heads, 63 sectors, 8924 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/sda1   *         1        16    128488+  83  Linux
/dev/sda2            17       277   2096482+  82  Linux swap
/dev/sda3           278       538   2096482+  82  Linux swap
/dev/sda4           539      8924  67360545    f  Win95 Ext'd (LBA)
/dev/sda5           539      7227  53729361   83  Linux
/dev/sda6          7228      8402   9438156   83  Linux
/dev/sda7          8403      8663   2096451   83  Linux
/dev/sda8          8664      8924   2096451   82  Linux swap

Disk /dev/sdb: 255 heads, 63 sectors, 8923 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/sdb1             1        16    128488+  83  Linux
/dev/sdb2            17       277   2096482+  82  Linux swap
/dev/sdb3           278       538   2096482+  82  Linux swap
/dev/sdb4           539      8923  67352512+   f  Win95 Ext'd (LBA)
/dev/sdb5           539      7227  53729361   83  Linux
/dev/sdb6          7228      8402   9438156   83  Linux
/dev/sdb7          8403      8663   2096451   83  Linux
/dev/sdb8          8664      8923   2088418+  82  Linux swap

Disk /dev/sdc: 255 heads, 63 sectors, 17847 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/sdc1             1     17847 143355996   83  Linux
[root at abc2 root]#



[root at abc2 root]# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: DELL     Model: PERC Legacy      Rev: V1.0
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: DELL     Model: root mirror      Rev: V1.0
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
  Vendor: DELL     Model: PERC RAID5       Rev: V1.0
  Type:   Direct-Access                    ANSI SCSI revision: 02
[root at abc2 root]#


[root at abc2 root]# lsmod | grep -i raid
aacraid                50112   8
scsi_mod              125756   2  [aacraid sd_mod]
[root at abc2 root]#


My observation on second server is, both fdisk and /proc/scsi/scsi files are showing all three
volumes . I am not understanding why i am not getting all 3 volumes with fdisk command on first server ?

Please , anyone can share the knowledge here ? . Thank you all.


Thanks & Regards,
Shashi Kanth



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