Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Technical Instruction Sure Solution 1003202.1 : How dptmgr names Logical Storage Units
PreviouslyPublishedAs 204394 Steps to Follow ------------------------------------------------------------------------ LSU Device Naming Conventions ------------------------------------------------------------------------ Prior to creating any Logical Storage Units (LSU's), Solaris[TM] will see a disk drive behind the SRC/P card as a typical Solaris drive. The drive could be formatted and file systems could be created on each slice. This is unlike our Raid Manager software which "hides" drives from Solaris. The drive is identified behind the raid card by the device path to the drive. Consider the following format output for a SUN 9.0 gig drive. c2t2d0 /pci@6,4000/pci@3/scsis@4/mscsi@0,0/sd@2,0 The mscsi@0,0 is the device path identifier for the SRC/P hardware raid card. Since this is in the path to the drive, we know the drive is behind the card. The drive will show up like this until we create a Logical Storage Unit from it. Once this happens, the device link for c2t2d0 will be removed. In the following example, a RAID 1+0 (mirror) will be created from 6 drives located behind one SRC/P card in an Sun Enterprise[TM] 450 drive bay. The drive names are... c3t0d0 c3t1d0 c3t2d0 c2t0d0 c2t1d0 c2t2d0 The resulting Logical Storage Unit will be c2t0d0. c2t0d0 has changed from a SUN 9.0 gig drive into an 27 gig RAID 1+0 mirror. The name is chosen from all the drives being used to make up the LSU. dptmgr will use the lowest value target from the lowest value controller from the drives selected. In this example, c2 was the lowest value controller and t0 was the lowest target value on that controller. Lastly, the other five disk drive device names will be removed from the /dev/dsk and /dev/rdsk directories. They are no longer available as regular drives. Their device links have become invalid. They have been incorporated into the Raid Array. dptmgr uses "disks -C" to remove these unwanted links. This functionality is standard with Solaris[TM] 7 and available on patch 107665-01 on Solaris[TM] 2.6. If the disk drive device names are ever required again, the LSU must be deleted and a boot -r performed. Product Sun Enterprise 450 Server Sun, Enterprise, 450 Previously Published As 21568 Change History Date: 2003-05-20 User Name: Administrator Action: Migration from KMSCreator Comment: updated by : Gary Northup comment : Not entered date : Jan 10, 2000 Version: 0 Product_uuid 29656238-0a18-11d6-91d9-a4e449afd809|Sun Enterprise 450 Server Attachments This solution has no attachment |
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