Silicon Graphics TP9100, Installation Instructions And User Manual

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3: Using TPM
Field Definitions
The definition of each field in the Modify Disk Device Status dialog box is given in
Table 3-2.
Table 3-2 Modify Disk Device Status Field Definitions
Field Definition
Make/Model/
[Firmware] This field returns the SCSI vendor ID, product ID, and firmware revision for each drive. For proper
operation, it is strongly recommended that each drive in a LUN have the same make, model, and
firmware release.
Serial Number The drive serial number
Worldwide Name
(7.01 and later
firmware only) A 64-bit identifier assigned to a particular drive. It is used to distinguish one drive from another. The
WWN may be used for network management purposes or whenever drive identification is needed.
Clock Speed The clock speed in MHz of the device. This is not very interesting now, but when 200 Mhz and 400
MHz fibre channel drives become supported, it will become quite important.
Number of Ports The number of ports used by each disk. The number should normally be 2 for FC and 1 for SCSI.
Interface The drive controller interface. FC-AL = Fibre Channel Arbitrated Loop.
Drive Speed
(7.01 and later
firmware only) The spindle speed in RPM of the hard disk drive
Physical The physical number of blocks and MB on the disk. 1 MB = 1024 * 1024 bytes, and one block = 512
bytes.
Usable The usable number of blocks and MB on the disk. These numbers are always less than the physical
numbers because the RAID controller allocates a portion of disk space for it’s Configuration On Disk
(COD). Usable sizes vary, based on the version controller firmware and Configuration on Disk (COD)
versions:
SGI 6.11 and 6.14 firmware used COD version 1.0.
SGI 7.01 and later firmware uses COD version 2.1.
LoopID A unique hexadecimal number for a particular disk drive. The LoopID is basically the equivalent of
a SCSI ID.
Channel/TargetID The channel number and target ID for a drive. GAM uses this extensively to identify individual disks.
List of LUNS A list of the logical drives that are using some or all of the space on a disk drive.
Status The Status area is color-coded. In addition to HOT SPARE and ON-LINE, it is possible that the drive
could be in another state, such as UNCONFIGURED.