SCSI storage enclosure 26
SCSI storage enclosure
The following information is provided for a SCSI storage enclosure.
SCSI Storage Enclosure Status
• Transfers/Sec—The average number of transfers on this SCSI bus each second (the sum of the Disk
Transfers/Sec for all hard drives on this bus).
• MBytes/Sec—The average number of megabytes transferred on this SCSI bus each second (the sum of the
Disk MBytes/Sec for all SCSI drives on this bus).
• SCSI Utilization %—The average SCSI utilization for this SCSI bus, which is primarily dependent on the
MBytes/Sec, and the SCSI protocol negotiated between the controller and each drive on the bus. The
negotiated SCSI protocol is reported in the hard drive inventory. The valid SCSI protocols include:
• SCSI-1—5 MB/s with 8-bit transfers at 5 MHz (5,000,000 bytes/s)
• Fast SCSI-2—10 MB/s with 8-bit transfers at 10 MHz (10,000,000 bytes/s)
• Fast-Wide SCSI-2—20 MB/s with 16-bit transfers at 10 MHz
• Ultra SCSI-3—20 MB/s with 8-bit transfers at 20 MHz
• Wide-Ultra SCSI-3—40 MB/s with 16-bit transfers at 20 MHz
• Wide Ultra2 SCSI—80 MB/s with 16-bit transfers at 40 MHz
• Wide Ultra3 SCSI—160 MB/s with 16-bit transfers at 80 MHz
• Ultra320 SCSI—320 MB/s with 16-bit transfers at 160 MHz
SCSI storage enclosure performance is determined by the SCSI Utilization %.
SCSI Storage Enclosure Inventory
• Enclosure Configuration
• The type or model of the storage enclosure
• Which SCSI protocol is supported by the storage enclosure
• The number of drive bays provided by the storage enclosure
• The number of SCSI drives installed in the storage enclosure
• The SCSI adapter attached to the storage enclosure and the port on the adapter
