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Old 04-26-2011, 08:26 AM   #1
Registered: Dec 2006
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Question RHEL 6 after boot primary partition shows /dev/sdb instead of /dev/sda

Dear All Members,

I have query about RHEL 6 and additional IBM storage DS3200. When RHEL 6 System Installed on IBM Server SystemX 3650 M2 took /dev/sda as primary partition when storage is attached and reboot the system or as it is it shows /dev/sdb partition instead of /dev/sda.

If we restart server without storage it takes regular /dev/sda partition after storage start it also takes regular partition of storage i.e. /dev/sdb.

But when both are restart together it would take /dev/sdb as primary partition. /dev/sda - Does not contain a vaild partition table error.

So what is the procedure to fix forcefully take regular partition by server as well as storage respectively.

Vipul Patel



Old 04-26-2011, 09:48 AM   #2
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Registered: May 2006
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I don't totally understand what you wrote, but yes, device names can change on reboot. This is why you should LABEL filesystem and mount them by label in /etc/fstab, OR mount them by UUID or path (see the /dev/disk/... subfolders).


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