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Re: RDAC capable of hot removing unmapped LUNs?

Thank you. That worked great.  Got the same answer from another forum
where I cross posted.  I didn't even think to remove RDAC from the
equation completely.


On Wed, Mar 24, 2010 at 10:06 AM, Eugene Vilensky <evilensky gmail com> wrote:
> On Tue, Mar 23, 2010 at 12:36 PM, GT4NE1 <GT4NE1 gmail com> wrote:
>> Hi all,
>> I'm running RHEL 5.2 64bit with RDAC 09.02.C2.16 attached to Sun
>> StorageTek 6540 LUNs. According to the RDAC docs, the "hot_add -d"
>> command should remove any unmapped LUNs without having to reboot, but
>> Sun support says rebooting is the only way. I've tried "hot_add -d"
>> and it doesn't work. Can someone confirm or deny. If rebooting is the
>> only way, that is a huge flaw in the RDAC drivers considering that is
>> the only officially supported RedHat multi-path driver for the 6540
>> according the compatibility matrix.
> Is it unsupported to use good ole sysfs?
> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/html/Online_Storage_Reconfiguration_Guide/removing_devices.html
> "echo 1 > /sys/block/device-name/device/delete where device-name may
> be sde, for example.
> Another variation of this operation is echo 1 >
> /sys/class/scsi_device/h:c:t:l/device/delete, where h is the HBA
> number, c is the channel on the HBA, t is the SCSI target ID, and l is
> the LUN."
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Matt Krause
krausem gmail com

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