Wednesday, November 02, 2005

Installing Solaris on FC storage with MPxIO

This evening I got another IBM Blade server HS20 with FC HBA. I wanted to install Solaris on it and suddenly I realized that it is a great opportunity to test install/boot from FC storage. Fortunately I had a DS4300 storage array connected to the system with some spare space left on one of its volume groups. I tried that kind of installation about a year ago, but until new boot was integrated into Solaris booting from FC HBA had little chances to success.
So I booted the Blade from the CDROM and it readily presented the FC disk as a choice for the installation. It worth noting that DS4300 is connected via two controllers, so MPxIO merged two hardware nodes into one virtual. This very long name c5t600A0B800019D82F000014804368A7C0d0 is the name of the disk based on its GUID rather then on WWPN. DS4300 is an Active/Standby box, however MPxIO supports these kind of controller (Engenio-based) pretty well. So the installation went ahead and I went to drink tea. 10 minutes later it was over and after reboot I enabled the BIOS on QLogic FC HBA card and set the FC node and LUN to boot from. That's was it. Everything just played happily along.

Here it is after the reboot:
# uname -a
SunOS b7 5.11 snv_25 i86pc i386 i86pc

And look where the root filesystem is mounted -
# df -h /
Filesystem size used avail capacity Mounted on
14G 2.7G 11G 20% /

Now, what constitutes that virtual disk
# luxadm disp /dev/rdsk/c5t600A0B800019D82F000014804368A7C0d0s2
DEVICE PROPERTIES for disk: /dev/rdsk/c5t600A0B800019D82F000014804368A7C0d0s2
Vendor: IBM
Product ID: 1722-600
Revision: 0520
Serial Num: 1T53176260
Unformatted capacity: 16384.000 MBytes
Write Cache: Enabled
Read Cache: Enabled
Minimum prefetch: 0x100
Maximum prefetch: 0x100
Device Type: Disk device

Controller /dev/cfg/c3
Device Address 200600a0b819d830,0
Host controller port WWN 2100000d6050ec96
Class primary
Controller /dev/cfg/c3
Device Address 200700a0b819d830,0
Host controller port WWN 2100000d6050ec96
Class secondary

Overall impression: very smooth integration of FC multipathing into boot subsystem. Many thanks to all the Sun' engineers involved with this framework.


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