Barracuda Low Profile Family 3.5-inch Disc Drives Formatted capacities of 2.15 to 4.55 Gbytes 7,200-RPM, 4.17 msec average latency 8- and 16-bit UltraSCSI interface Fibre Channel-Arbitrated Loop (FC-AL) interface Single Connector Attachment (SCA) Advanced SCSI Architechture II (ASA II) MR heads, embedded servo and PRML channel Barracuda Low Profile The Barracuda Low Profile family offers formatted capacities of 2.15 to 4.55 Gbytes in a low-profile 1-inch high design. With Advanced SCSI Architecture II, SCSI-3 SPI compliance and a range of interfaces including Ultra SCSI andFibre Channel Arbitrated Loop, the Barracuda Low Profile drives continue Seagate's tradition of superior performance, quality and reliability. Barracuda Low Profile Family ST32272N ST32272W ST32272WD ST32272WC ST32272DC Barracuda 4XL ST34572N ST34572W ST34572WD ST34572WC ST34572DC Barracuda 4XL ST32171N ST32171W ST32171WD ST32171WC ST32171DC Barracuda 4LP ST32271N ST32271W ST32271WD ST32271WC ST32271DC Barracuda 4LP ST34371N ST34371W ST34371WD ST34371WC ST34371DC ST34371FC Barracuda 4LP ST34571N ST34571W ST34571WD ST34571WC ST34571DC ST34571FC Barracuda 4LP Formatted Capacity, Gbytes (512 bytes/sector) 2.26 4.55 2.15 2.26 4.35 4.55 Interface UltraSCSI (8- and 16-bit SCA ) UltraSCSI (8- and 16-bit SCA ) UltraSCSI (8- and 16-bit SCA ) UltraSCSI (8- and 16-bit SCA ) UltraSCSI (8- and 16-bit SCA ) Fibre Channel (Dual Port) UltraSCSI (8- and 16-bit SCA ) Fibre Channel (Dual Port) Performance Internal Transfer Rate, ZBR (Mbits/sec) 92 to 140 92 to 140 80 to 122 83 to 126 80 to 122 83 to 126 External Transfer Rate (Mbytes/sec) 20/40 20/40 20/40   20/40 20/40/100 20/40/100 Multisegmented Cache (Kbytes) 512 512 512 512 512 512 Track-to-Track Seek Read/Write (msec) 0.8/0.9 0.8/0.9 0.8/0.9 0.8/0.9 0.8/0.9 0.8/0.9 Average Seek (msec) 8.8/9.8 8.8/9.8 8.8/9.8 8.8/9.8 8.8/9.8 8.8/9.8 Maximum Seek (msec) 17/19 17/19 17/19 17/19 17/19 17/19 Spindle Speed (RPM) 7,200 7,200 7,200 7,200 7,200 7,200 Average Latency (msec) 4.17 4.17 4.17 4.17 4.17 4.17 Configuration/Organization Discs/Data Surfaces 2 4 3 3 5 5 Read/Write Heads 4 8 6 6 10 10 Servo Head Embedded Embedded Embedded Embedded Embedded Embedded Bytes per Sector (typ) 512 512 512 512 512 512 Cylinders 6,311 6,311 5,178 5,178 5,178 5,178 Recording Method PRML PRML PRML PRML PRML PRML Reliability and Data Integrity MTBF (power on hours) 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 MTTR (hours) depot depot depot depot depot depot Recoverable Read Errors per Bits Read 1 per 1011 1 per 1011 1 per 1011 1 per 1011 1 per 1011 1 per 1011 Nonrecoverable Read Errors per Bits Read 1 per 1014 1 per 1014 1 per 1014 1 per 1014 1 per 1014 1 per 1014 Seek Errors (per seek) 1 per 108 1 per 108 1 per 107 1 per 107 1 per 107 1 per 107 Service Life 5 5 5 5 5 5 Limited Warranty (yrs) 5 5 5 5 5 5 Power Requirements +12 VDC +/-5% (amps typ) [FC] 0.52 0.54 0.52 0.52 0.54 [0.5] 0.54 [0.5] +12 VDC +/-5% (amps max) [FC] 0.85 0.95 0.85 0.85 0.95 [0.6] 0.95 [0.6] +5 VDC +/-5% (amps) 0.46 0.46 0.46 0.46 0.46 [1.7] 0.46 [1.7] Power (Idle watts) 8.8 8.8 8.8 8.8 8.8 [13] 8.8 [13] Environmental Operating Temperature (°C) 5 to 50 5 to 50 5 to 50 5 to 50 5 to 50 5 to 50 Nonoperating Temperature (°C) -40 to 70 -40 to 70 -40 to 70 -40 to 70 -40 to 70 -40 to 70 Physical Height (inches/mm) 1.0/25.4 1.0/25.4 1.0/25.4 1.0/25.4 1.0/25.4 1.0/25.4 Width (inches/mm) 4.0/101.6 4.0/101.6 4.0/101.6 4.0/101.6 4.0/101.6 4.0/101.6 Depth (inches/mm) 5.74/145.8 5.74/145.8 5.75/146.0 5.75/146.0 5.75/146.0 5.75/146.0 Weight (lb/kg) 1.5/0.68 1.5/0.68 1.5/0.68 1.5/0.68 1.5/0.68 1.5/0.68

Capacity calculated with typical sparing. Sparing is user optional.

Specifications subject to change without notice.