Unable to add new virtual disk after server reboot (kernel upgrade)

Question

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

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.

Dev Mgr · Answer

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

Adrnalnrsh · Answer

Does anyone know if 5.5 is supported yet?

Adrnalnrsh · Answer

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 · Answer

Ok, I see that this is second gen, so my only question is about the drivers?

mrokkam · Answer

RHEL 5.5 appears to be supported with 2nd gen firmware http://support.dell.com/support/edocs/systems/md3000i/en/ Check out the support matrix above.

Dev Mgr · Answer

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 · Answer

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 · Answer

Also will I need to restart the host?

mrokkam · Answer

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 · Answer

Thanks will do.

PowerVault

Unable to add new virtual disk after server reboot (kernel upgrade)

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