Comment 0 for bug 579572

I found this bug after doing a fresh install of Ubuntu 10.04 LTS server (amd64) on a Dell PowerEdge R410, with hardware RAID (SCSI storage controller SAS1068E PCI-Express Fusion-MPT SAS (LSI Logic / Symbios Logic)). Before installing Ubuntu 10.04, this server was booting without a problem with CentOS 5.4 (Linux 2.6.18)

When the installation is over and after the first reboot, I get this error message
"Gave up waiting for root device.
...
ALERT! /dev/disk/by-uuid/[mydiskUUID here] does not exit. Dropping to a shell!

Busybox v1.13.3 (Ubuntu 1:1.13.3-1ubuntu11) built-in shell (ash)

(initramfs)
"

If I wait between 10 and 20 seconds, I see
"
35.538649] sd 4:1:0:0: [sda] 584843264 512-byte logical blocks: (299 GB/278 GiB)
[ 35.539484] sd 4:1:0:0: [sda] Write Protect is off
[ 35.539555] sd 4:1:0:0: [sda] Mode Sense: 03 00 00 08
[ 35.540034] sd 4:1:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 35.541687] sda: sda1 sda2 sda3 sda4 < sda5 >
[ 35.560048] sd 4:1:0:0: [sda] Attached SCSI disk
[ 36.521418] Adding 2096472k swap on /dev/sda3. Priority:-1 extents:1 across:2096472k
[ 36.761904] EXT3 FS on sda2, internal journal
[ 37.181651] EXT3 FS on sda1, internal journal
"

Then, I type exit and the boot resumes normally. I could reproduce this bug after every reboot.

I solved this issue by adding

GRUB_CMDLINE_LINUX_DEFAULT="rootdelay=50"

to

/etc/default/grub

and running update-grub

The kernel is Linux 2.6.32-22-server #33-Ubuntu SMP Wed Apr 28 14:34:48 UTC 2010 x86_64 GNU/Linux

I attach outputs of lshw, dmidecode, lscpi -vvv and lsmod

Unlike Bug #576302 , I can solve the problem with rootdelay=50 and I don't use mptspi kernel module, so I think it is another bug (but may be there are related).