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Conference ssag::ask_ssag

Title:Ask the Storage Architecture Group
Notice:Check out our web page at http://www-starch.shr.dec.com
Moderator:SSAG::TERZAN
Created:Wed Oct 15 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6756
Total number of notes:25276

6692.0. "KZPAC, RAID ARRAY 230 and RZ40 (9GB drives) question" by MQOOA::16.174.160.11::courchesne () Thu May 15 1997 14:59

I have the following problem:

RAID ARRAY 230
9 GB disks

The customer is trying to create a 6 X 9GB RAID ensemble.  It seems that the 
controller will not allow him to do so.

There is no specific limitation stated on the RAID ARRAY 230 on this item.  Is 
there a known solution for this issue?
Thanks

Andre J. Courchesne
Digital Montreal
T.RTitleUserPersonal
Name		DateLines
6692.132GB maxSUBSYS::TURCOTTEfun stuffThu May 15 1997 18:326
maximum size logical drive is 32GB for KZESC, KZPSC, KZPAC
with rev 2.xx firmware ... you can create a four-member
RAID 5 logical drive out of 9GB drives, RAID overhead brings
total logical storage down under 32GB limit.  

.
6692.2Is it modified in the next release?MQOOA::16.174.160.11::courchesneFri May 16 1997 10:276
Are plans in place to provide a larger logical drive with a newer version of 
the HSOF?

Thanks
Andre J. Courchesne
Digital Montreal
6692.3OTOOA::LAVIGNEFri May 16 1997 11:437
    Andre,
    
    Just make a couple smaller logicals instead.  Besides do you have any
    idea how long it will take to init a drive that big.
    
    Regards,
    JP
6692.4What about HSZ50 ??ZPOVC::CSNAQSMon May 26 1997 23:415
    Hi,
    
    How about HSZ50 and other ( HSJ, HSD ....) ? What are their limit ?
    
    Thanks
6692.51 RAID 3/5 set is maxi 14 membersSTOWKS::SLUISHans van Sluis - StorageWorks Engineering Support Europe- DTN 889 9526Tue May 27 1997 08:089
One raid 3/5 set is maximum 14 members, so netto 13 members.
13 * 9 = 117 G

A stripeset can be 14 members, so netto  14 members 
14 * 7 = 126 G

See the SPD of HSOF V5.1

Hans
6692.6SSDEVO::RMCLEANTue May 27 1997 13:111
But... You are restricted to 120GB