User Manual - A3661-90001

1-30 RAID General Information
:KHQDGDWDGLVNLQWKH5$,'JURXSIDLOVWKH63DXWRPDWLFDOO\UHFRQVWUXFWVDOOXVHUGDWDIURPWKH
XVHUGDWDDQGSDULW\LQIRUPDWLRQRQWKHUHPDLQLQJGLVNPRGXOHV,IWKHSDULW\GLVNIDLOVWKH63
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LVUHSODFHGWKH63DXWRPDWLFDOO\UHEXLOGVWKH5$,'JURXSXVLQJWKHLQIRUPDWLRQVWRUHGRQWKH
UHPDLQLQJPRGXOHV3HUIRUPDQFHGHJUDGHVZKLOHWKH63UHEXLOGVWKHJURXSEXWWKHGLVNDUUD\
FRQWLQXHVWRRSHUDWHDQGDOOGDWDLVDFFHVVLEOHGXULQJWKLVWLPH7KHUHEXLOW5$,'JURXSFRQWDLQVD
UHSOLFDRIWKHLQIRUPDWLRQLWZRXOGKDYHFRQWDLQHGKDGWKHGLVNPRGXOHQRWIDLOHG,IWZRRIWKHILYH
GLVNPRGXOHVLQD5$,'JURXSIDLOWKHJURXSEHFRPHVLQDFFHVVLEOH7RJXDUGDJDLQVWWKLV
PXOWLSOHJOREDOKRWVSDUHVVKRXOGEHFRQILJXUHG
5$,'JURXSVLQD+HZOHWW3DFNDUG0RGHO)&+LJK$YDLODELOLW\'LVN$UUD\GRQRWXVHWKHVDPH
PHPRU\VFKHPHIRUUHDGDQGZULWHFDFKLQJDVLVXVHGE\WKHRWKHU5$,'JURXSV,QVWHDGHDFK
5$,'JURXSUHTXLUHVGHGLFDWHG63PHPRU\IRUFDFKLQJ7KLVPHPRU\LVLQDGGLWLRQWRWKH 0%
XVHGE\HDFK63$PLQLPXPRI0%RIPHPRU\SHU5$,'JURXSLVUHTXLUHGRQHDFK63 0%RI
PHPRU\SHU5$,'JURXSRQHDFK63LVUHFRPPHQGHGEXWPRUHFDQEHFRQILJXUHG$5$,'
JURXSXVHVWKHPHPRU\RQWKH63WKDWRZQVLWEXWEHFDXVH/81RZQHUVKLSFDQWUDQVIHUWRWKH
RWKHU63WKHDPRXQWRIPHPRU\PXVWEHLGHQWLFDORQHDFK63
%HFDXVHWKH63UHTXLUHV 0%RIPHPRU\IRULWVRZQXVHDQGDQG 0%RI6,00PHPRU\
FDQEHLQVWDOOHGRQDQ63DPLQLPXPRI 0%RI6,00PHPRU\LVUHFRPPHQGHGIRURQH5$,'
JURXS 0%IRU63XVHSOXV 0%IRU5$,'PHPRU\WRWDOV 0%7ZR5$,'JURXSVFDQEH
FRQILJXUHGXVLQJWKHVDPH 0%RI6,00 0%IRU63XVHSOXV 0%IRURQH5$,'JURXSSOXV
 0%IRUWKHVHFRQG5$,'JURXSWRWDOV 0%7KLVLVLOOXVWUDWHGLQ7DEOHZKLFKDVVXPHVWKH
UHFRPPHQGHG 0%RIPHPRU\IRUHDFK5$,'/81
Table 1-4 RAID-3 Memory Recommendations Based on 6 MB per LUN
Number of
bound RAID-3
LUNs
Total SIMM
memory
on each SP
SP memory
used
by each SP
Total RAID-3
memory
on each SP
Unused SIMM
memory
on each SP
1 16 MB 4 MB 6 MB 6 MB
2 16 MB 4 MB 12 MB 0 MB
3 32 MB 4 MB 18 MB 10 MB
4 32 MB 4 MB 24 MB 4 MB
5 64 MB 4 MB 30 MB 30 MB
6 64 MB 4 MB 36 MB 24 MB