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ā05-16-2011 06:58 AM
ā05-16-2011 06:58 AM
EVA/CV/SSSU: Reduce Diskcount in Diskgroup
my objective is to replace an 80x 146GB Diskgroup by an 48x 600GB Diskgroup without Host Downtime. I accomplished this so far by ungrouping each single 146GB Disk according to its RSS ID and RSS Index. I managed to swap 16 Disks a day and let Leveling complete throughout the night. Now I am done with the addition of 48 new Disks and look forward to reduce the Diskgroup by 32 old 146GB Disks. But how can i make sure that during the Ungroup-Phase of each single disk my existing 600GB RS-Sets will not be mixed and merged with 146GB Disks? I'm looking for an SSSU command that can UNGROUP a complete RS-Set or at least specify Disks in multiples of 8? I have not yet found any white paper or best practice document regarding my problem. Have anybody of you got some ideas on this?
Regards
Manfred
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ā05-16-2011 10:05 PM
ā05-16-2011 10:05 PM
Re: EVA/CV/SSSU: Reduce Diskcount in Diskgroup
http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManualā©=en&cc=us&docIndexId=179111&taskId=101&prodTypeId=12169&prodSeriesId=471497
Have you seen this advisory, maybe that can tell you what you need?
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01888544
A question for me:
When you group the disks by RSS - does that give you all the available space on the disks? And the other way around: if the disk sizes are mixed in an RSS - does that limit the usable space on each disk?
I always thought this was done per disk group and not per rss.
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ā05-17-2011 10:26 PM
ā05-17-2011 10:26 PM
Re: EVA/CV/SSSU: Reduce Diskcount in Diskgroup
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ā05-18-2011 02:11 AM
ā05-18-2011 02:11 AM
Re: EVA/CV/SSSU: Reduce Diskcount in Diskgroup
The output of sssu command "ls disk full xml" and Microsofts Logparser Utiliy helped me a lot to query rssid und rssindex information.
Logparser Command to query Disk Information:
logparser -rtp:-1 -fmode Tree "select distinct diskname, modelnumber, firmwareversion, shelfnumber, diskbaynumber, rssid, rssindex from lsdiskfull.xml where (diskgroupname='yourdiskgroup') order by rssid, rssindex"
@Johan: No, usable space is not limited to the smallest disk if you mix sizes. All available space can be used. At the beginning of the merge operation the double amount of the largest Disk Size will be reserved if you use "Single Protection".
@Uwe: Though its not allowed, EVAs can be tweaked :-)
Regards
Manfred
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ā05-18-2011 02:13 AM
ā05-18-2011 02:13 AM