[rhelv6-list] Partition disappeared?

[Collins, Kevin [BEELINE]]

So, are you saying that the device file /dev/sda1 doesn't exist or that /dev/sda1 is not getting mounted? If it is the latter case, what happens when you try to mount it?

Thanks,

Kevin

-----Original Message-----
From: rhelv6-list-bounces at redhat.com [mailto:rhelv6-list-bounces at redhat.com] On Behalf Of Blomqvist Janne
Sent: Wednesday, September 12, 2012 1:02 AM
To: Red Hat Enterprise Linux 6 (Santiago) discussion mailing-list
Subject: [rhelv6-list] Partition disappeared?

Hi,

I'm seeing a strange issue where, per dmesg, a partition is found when the kernel is booted, but later it has disappeared and by the time /etc/fstab is parsed and filesystems mounted it cannot be found and bootup thus fails.

>From dmesg:

sd 0:0:0:1: [sda] 143305920 512-byte logical blocks: (73.3 GB/68.3 GiB)
sd 0:0:0:1: [sda] Write Protect is off
sd 0:0:0:1: [sda] Mode Sense: 6b 00 00 08
sd 0:0:0:1: [sda] Write cache: disabled, read cache: disabled, doesn't support DPO or FUA
 sda: sda1 sda2

Later on sda1 has disappeared (e.g., /dev/sda1 doesn't exist), although with parted I can still find it:

GNU Parted 2.1
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                               
Model: HP LOGICAL VOLUME (scsi)
Disk /dev/sda: 73.4GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  525MB   524MB   primary  ext4         boot
 2      525MB   73.4GB  72.8GB  primary               lvm


I haven't found any messages anywhere wrt. sda1 disappearing. As you can deduce from the above, the partition in question is /boot. So the partition itself seems Ok, considering grub can read and boot the kernel there. I just cannot access it from the booted system (commenting out the /boot entry in fstab allows the system to boot successfully).

The system in question is currently running RHEL 6.3, originally it was installed as 6.x and upgraded over time.

Has anyone seen something similar, or better yet, seen and fixed it?


--
Janne Blomqvist

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