PowerVault 130T Service Manual Component Locations4473D 1–7 Data archive Hierarchical storage management (HSM) Media management Disaster recoveryThe type of host-software solution chosen can optimize the performance of small tomedium-sized networks, support multiple platforms, improve availability andscalability of products, and deliver fully automated operations.Host-level software also contains drivers using SCSI commands to control themotion of the robot and track the location of cartridge tapes (audit) using thevolume serial number (VOLSER) on the cartridge bar code labels.MicrocodeMicrocode for the library and tape drives controls the functional operation of thesedevices.The microcode for tape drives is loaded from a cartridge tape.The microcode for the library is loaded from a personal computer (PC) through theCSE port on the rear of the library. Since library microcode is stored in flash prom,in the event of a power outage, the PowerVault 130T powers on and returns to itsfunctional state without requiring microcode reload when power comes back.DLT DrivesThe PowerVault 130T Library has slots for up to four DLT4000 or DLT7000 tapedrives. These are high-performance, large capacity, streaming cartridge tape drivesusing half-inch CompacTape types III, III XT, or IV. Depending on the tape, typeof data, type of tape drive, and compression algorithm, each cartridge tape can storefrom 10 to 70 gigabytes (GB) of data.Table 1–1. DLT4000/DLT7000 ComparisonParameter DLT4000 DLT7000Cartridge CapacityNativeCompressed20 GB40 GB35 GB70 GBTransfer RateNativeCompressed1.5 MB/sec3.0 MB/sec5 MB/sec10 MB/secSCSI Interface Fast/Narrow Fast/WideTrack Density 256 trks/in. 416 trks/in.Buffer Size 2 MB 8 MBRead/Write Tape Speed 98 in./sec 160 in./secRewind Tape Speed 150 in./sec 175 in./sec