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Fujitsu 4,40GB 512kb 8ms USCSI-3

Fujitsu offers high-capacity and high-speed, low-profile 3.5inch disk drives - the 4 GB M2954 and the 2 GB M2952. Both drives incorporate Fujitsu-designed MR (magneto-resistive) heads and utilize PR4ML read channel technology. The adoption of MR heads and PR4ML technology realizes extremely high areal density near 800 M bits/square inch.

Rotational speed of the M2952 and M2954 is 7200 rpm, which realizes fast average positioning time of 8 ms for read and fast average latency time of 4.17 ms. Furthermore, the M2952 and the M2954 are guaranteed by Fujitsu's high reliability standards.

With high capacity, high rotational speed and high reliability, the M2952 and the M2954 are well suited for networks, minicomputers, workstations, file servers and multi-user applications, which require high performance and reliability.

Features

Drive Features

High capacity 4.35 GB and 2.40 GB
Fast average positioning time: 8 ms, read; 9 ms, write
Fast rotational speed of 7,200 rpm
High reliability of 1,000,000 Hours MTBF
Advanced MR head
New design Disk Enclosure
Light-weight rotary actuator
PR4ML read channel technology

SCSI Features

SCSI-2 command set

Supports SCSI-3 SPI (SCSI Parallel Intertace)(Q/R type)

Supports FAST-20 (SY,Q,E type)

Supports SCA-2 (E type)

Data transfer rate
10 MB/s (Sync.) for SA type
20 MB/s (Sync.) for SY, R type
40 MB/s (Sync.) for Q, E type

Up to 16 SCSI devices are connectable on the same SCSI bus (Q/R/E type)

Single-ended and differetial SCSI

Programmable 506 KB multisegmented buffer

36 MB/s buffer throughput

Downloadable firmware

Read-ahead cache

Write cache

Defective block slipping

Tagged command queuing (Max. 128 commands)

Reed Solomon ECC with On-the-Fly correction

ANSI X3.131-1986, ANSI X3.131-1994, CCS 4B,X3T9.2-375R Rev.10K and X3T9.2 855D Rev.12 compatibility

Programmable block size: 180 to 4,160 byte/block

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