IBM 3580-L23 Setup Guide - Page 18
Drive Performance, Model, SCSI Attachment, Ultrium 1 or Ultrium 2, Performance Characteristic - lvd
View all IBM 3580-L23 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 18 highlights
Table 1. 3580 Tape Drive Models Model L11 L13 L23 H11 H13 H23 SCSI Attachment LVD LVD LVD HVD HVD HVD Ultrium 1 or Ultrium 2 Ultrium 1 Ultrium 1 Ultrium 2 Ultrium 1 Ultrium 1 Ultrium 2 Drive Performance If you run applications that are highly dependent on tape-processing speed, you can take advantage of the significant performance improvements provided by the IBM 3580 Ultrium 2 Tape Drive. Table 2 lists the performance characteristics of both the Ultrium 2 and Ultrium 1 models. Table 2. Performance characteristics of the Ultrium 2 Tape Drive and the Ultrium 1 Tape Drive Performance Characteristic Tape Drive Ultrium 2 Tape Drive Ultrium 1 Tape Drive Native sustained data rate 35 MB/s (with Ultrium 2 media) 15 MB/s 20 MB/s (with Ultrium 1 media) Compressed data rate (at 2:1 compression) 70 MB/s (with Ultrium 2 media) 30 MB/s 40 MB/s (with Ultrium 1 media) Maximum sustained data rate (at maximum compression) 107 MB/s (Ultra160) 60 MB/s Burst data rate for Low Voltage Differential (LVD) SCSI drives 160 MB/s (Ultra160) 80 MB/s (Ultra2) Burst data rate for High Voltage Differential (HVD) SCSI drives 40 MB/s (Ultra) 40 MB/s (Ultra) Nominal load-to-ready time 15 seconds 20 seconds Nominal unload time 15 seconds 18 seconds Average search time to first byte of data 49 seconds 73 seconds Note: All sustained data rates are dependent on the capabilities of the interconnect (for example, an UltraSCSI bus is limited to less than 40MB/sec). By using the built-in data-compression capability of the tape drives, you can achieve greater data rates than the native data transfer rate. However, the actual throughput is a function of many components, such as the host system processor, disk data rate, block size, data compression ratio, SCSI bus capabilities, and system or application software. 2 IBM 3580 Ultrium Tape Drive Setup and Operator Guide