3.5-inch magnetic disk drives
M2952S/Q/R/E
M2954S/Q/R/E
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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