We have a client who has been replicating their Linux boot disk at their site to a LUN at our premises in another city.
Up till now they have been able to boot off the replicated lun with no
problem but suddenly it no longer works and they are insisting that we
"make it work".
When we try to boot from the sms menu it does not see the boot disk.
However if we boot from the Linux DVD we are able to see the boot disk
and can mount and umount filesystem with no problem.
Please can someone help me? Is this supported?
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3 replies Latest Post - 2011-08-10T12:32:34Z by jscheel
Pinned topic Replicate pSeries Linux Boot disk
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Updated on 2011-08-10T12:32:34Z at 2011-08-10T12:32:34Z by jscheel
willschm 2000004EXX45 PostsACCEPTED ANSWER
Re: Replicate pSeries Linux Boot disk2011-08-08T21:20:06Z in response to PeterCarterHow is the replica created? Were there any other discernible changes associated with the "suddenly it no longer works"? (I'm fishing for a 'different disk', or 'reformatted drive' or some other change that seems innocent :-) ).As I recall;The SMS menus will only list a drive in the boot-from list if it determines it is actually bootable. There may be specific checks for a elf binary within a PReP type 41 partition... `sfdisk -l` for the boot drive will show a "*" under the "Boot" heading to indicate this.# sfdisk -l<snip...>Device Boot Start End #cyls #blocks Id System
/dev/sda1 * 0+ 0 1- 8001 41 PPC PReP Boot
/dev/sda2 1 510 510 4096575 83 Linux
<snip...>Per sfdisk help, a -A option will set the active (bootable) flag.
PeterCarter 060002126S2 PostsACCEPTED ANSWER
Re: Replicate pSeries Linux Boot disk2011-08-10T06:53:39Z in response to willschmHi,The only change that I am able to pin-point is that the SAN Switch has had a micro code update. We uses a different server first to boot from, but when that did not work we tried the original server, HBA, cable, port etc and still got the same result.When we check to see if we can see the boot disk from within Linux it is there.Regards