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Adrnalnrsh
41 Posts
0
40220
August 30th, 2010 17:00
Unable to add new virtual disk after server reboot (kernel upgrade)
I can still see all of the previous storage (luns) assigned however I cannot see the new virtual disk I assigned to this host.
#tail -F /var/log/messages
kernel: scsi 6:0:0:0: Unexpected response from lun 1 while scanning, scan aborted
#dmesg
scsi 6:0:0:0: Unexpected response from lun 1 while scanning, scan aborted
scsi 6:0:0:0: Unexpected response from lun 1 while scanning, scan aborted
end_request: I/O error, dev sdd, sector 32
Buffer I/O error on device sdd, logical block 4
Buffer I/O error on device sdd, logical block 5
Buffer I/O error on device sdd, logical block 6
Buffer I/O error on device sdd, logical block 7
Buffer I/O error on device sdd, logical block 8
#fdisk -l
Disk /dev/sdd: 20 MB, 20971520 bytes
64 heads, 32 sectors/track, 20 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Disk /dev/sdd doesn't contain a valid partition table
One thing I noticed was two modules missing.
#lsmod | grep mpp
mppVhba 162016 0
mppUpper 143692 1 mppVhba
scsi_mod 196953 15 mppVhba,mppUpper,usb_storage,mptctl,scsi_dh,sr_mod,sg,mptspi,scsi_transport_spi,libata,mptsas,mptscsih,scsi_transport_sas,megaraid_sas,sd_mod
#cat /etc/redhat-release
CentOS release 5.5 (Final)
#uname -r
2.6.18-194.3.1.el5
#dkms status
linuxrdac, 09.03.0C06.0030, 2.6.18-194.3.1.el5, x86_64: installed
#hot_add
Starting new devices re-scan...
scan mptsas HBA host /sys/class/scsi_host/host1...
no new device found
run /usr/sbin/mppUtil -s busscan...
scan mpp virtual host /sys/class/scsi_host/host6...
no new virtual device found
/usr/sbin/hot_add is completed.
Adrnalnrsh
41 Posts
1168
0
Posted November 15th, 2010 10:00
Does anyone know if 5.5 is supported yet?
Adrnalnrsh
41 Posts
1168
0
Posted November 15th, 2010 12:00
Ok, I have the following firmware.
07.35.22.61 - is this second gen? Don't see anything actually saying it is, but it would seem so.
Do I need to install an updated driver then to make 5.5 work and can this be done online or should I schedule downtime?
Adrnalnrsh
41 Posts
1168
0
Posted November 15th, 2010 12:00
Ok, I see that this is second gen, so my only question is about the drivers?
You'll want to verify that you have the latest DRAC driver installed (don't try to use linux native multipathing). You can check the latest version on the CD/ISO in the linux\RPMS\rh5 folder (compare the installed version to the version number in the filename).
Adrnalnrsh
41 Posts
1168
0
Posted November 15th, 2010 14:00
Installed rdac
linuxrdac-09.03.0C06.0030-1dkms
On cd
linuxrdac-09.03.0C06.0234-1dkms
Should I just do a rpm -Uvh ? then run hot_add?
Adrnalnrsh
41 Posts
1168
0
Posted November 15th, 2010 15:00
Also will I need to restart the host?
the simplest method would be to use the RCD and run the install script. This will ensure that all the correct versions and supporting modules are installed.
I do believe that you have to reboot the host after install but I am not sure....wouldn't hurt to do it :-D
Adrnalnrsh
41 Posts
176
0
Posted November 16th, 2010 09:00
Thanks will do.
Dev Mgr
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1168
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Posted August 31st, 2010 08:00
If you check the MD3000/MD3000i support matrix, Red Hat 5.5 isn't supported (2.6.18-194 is the Red Hat 5.5 kernel). This kernel has been out several months without Dell adding it to the support matrix. This probably means that that kernel won't work (properly) with the RDAC driver that's currently available.
I'd suggest you
- revert to a supported kernel and stay on that till Dell comes out with a newer resource CD (in combination with an updated support matrix that shows that RHEL 5.5 is supported) and update the RDAC driver in combination with updating the kernel
Or, if failover/redundancy isn't too important;
- you reboot the server to see if that finds the disk, and accept that if a failure were to occur, you may not have failover