User Manual

310
Vess R2000 Series Product Manual Promise Technologies
WritePolicy= Usedtospecifythewritepolicyforthelogicaldrive.
writethru Writesarenotcached
writeback Writesarecached
ReadPolicy= Usedtospecifyreadpolicyforthelogicaldrive.
readahead Readsextradatatoreducereadtimesforsequentialdata.
readcache Cachesthereadsincasethesamerequestismadeagain.
nocache Noreadcache.
parity= UsedtospecifythemethodofparitydistributionforRAID5,50,6,
 and60.
left Leftasymmetric.
right Rightasymmetric.
Axle= RAID50,3to32drivesperaxle.
 RAID60,4to32drivesperaxle.
 Rangeis2to16axles.
codec= UsedtospecifythecodecschemeforRAID6and60. 
 p+q       
 q+q
PreferredCtrlId= UsedtospecifywhichcontrollertheLDispreferredforLUN
 afnity.Validvalueis1or2.Ifvalueisnotspecied,LUNafnity
 willbeautobalanced.
PerfectRebuild= UsedtospecifywhichlogicaldrivessupplytoPerfectRebuild.
enable (Default)Themaximumamountoflogicaldrivewhichsupport
 perfectrebuildis30.Ifyouselectperfectrebuild=enable,only
 sectorswherewritechangesoccurredarerebuilt.
disable Perfectrebuildwillnotsupplytothislogicaldrive.
-c<arraycount> Speciesthenumberofarraystogiveasummaryofwhenused