Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Technical Instruction Sure Solution 1011684.1 : How Many Logical Storage Units can you make with dptmgr (SRC/P)
PreviouslyPublishedAs 216019 Steps to Follow The Sun StorEdge Intelligent SCSI Raid Controller[TM] builds virtual drives just like Sun's other raid products. The virtual disk drive created is called a "Logical Storage Unit" or "LSU". This jargon is synonymous with the Raid Manager "lun", or the Volume Manager "volume". Just like Raid Manager, there is a finite number of LSU's allowed. This is what is currently supported: 18 Raid-0 LSU's or 18 Raid-1 LSU's or 12 Raid-5 LSU's or 18 any combination It's important to note that these limits are more a function of the number of drives allowed as opposed to a limit on the card itself. The card can support up to 3 (12 disk) multipacks. This allows a total of 36 drives. SRC/P allows using a disk drive only once. With 36 drives, this yields: 18 (2 disk drive) stripes or 18 (2 disk drive) mirrors or 12 (3 disk drive) raid 5's. This works great if the GUI is used to create the LSU's. However, the command 'dptutil' provides the -s option to allocate a portion of the drive. This would obviously provide the space to make more LSU's, but one nasty limitation with SRC/P is the drive can only be used once. For example, if 1GB is allocated on an 18 gig drive for a raid5 device, the remaining 17GB is lost. The remaining 17GB cannot be used to create another LSU. The -s option should not be used. Product Sun Enterprise 450 Server Sun Enterprise 250 Server Previously Published As 21422 Change History Date: 2003-05-20 User Name: Administrator Action: Migration from KMSCreator Comment: updated by : Gary Northup comment : edited content date : Jan 5, 2000 Version: 0 Product_uuid 29656238-0a18-11d6-91d9-a4e449afd809|Sun Enterprise 450 Server 2962179a-0a18-11d6-845c-9c8399e8b5f2|Sun Enterprise 250 Server Attachments This solution has no attachment |
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