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тАО04-24-2001 12:10 PM
тАО04-24-2001 12:10 PM
I would like to know what patch resolved the problem on HP-UX 11 where LUNs presented to the HBA had to be in sequence for the HBA and Host to properly see the devices.
I have experienced this feature a number of times with EMC arrays and have always insisted upon getting devices presented to the host in a sequential manner so as to ensure that all devices were seen by the host.
Thanks
Solved! Go to Solution.
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тАО04-24-2001 12:17 PM
тАО04-24-2001 12:17 PM
Re: Non sequenced LUNs
SCSI controller's on the same bus. The RAID LUN's always appeared as expected.
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тАО04-24-2001 01:02 PM
тАО04-24-2001 01:02 PM
SolutionNote that this patch depends on PHKL_18543, which if it is already installed and you attempt to re-install it, can really cause you problems.
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тАО04-24-2001 06:39 PM
тАО04-24-2001 06:39 PM
Re: Non sequenced LUNs
That is, LUNS should be in the string in order to be visible to the host.
And HP has applied the same rule to XP-array but with a new released microcode, what XP-array does is to trick the host into thinking LUN0 and the string are available by creating a pseudo devices for each SCSI target ID so you can see pseudo device by issuing "ioscan" even if a LUN is not assigned.
Because HP achieved this under the microcode level of the array, it would be better to ask for information about that from EMC support personal.
Regards,
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тАО04-25-2001 02:32 AM
тАО04-25-2001 02:32 AM
Re: Non sequenced LUNs
this was called the LUN gap problem and occured when, on EMCs for example you deleted a LUN 3 for example, LUN4 and greater vanishes
I can't recall exactly the patch, I'll ask around.
Later,
Bill
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тАО04-26-2001 10:51 PM
тАО04-26-2001 10:51 PM
Re: Non sequenced LUNs
Note that some customers with large numbers of LUNs have experience much longer boot times with PHKL_22759 installed (because we are now spending time scanning the "LUN holes"). We are working on a complementary patch to improve the boot times.
Ron Lawson
project manager, hp-ux mass storage
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тАО06-13-2001 08:00 AM
тАО06-13-2001 08:00 AM
Re: Non sequenced LUNs
Ron Lawson
hp-ux mass storage r&d