NEC 1.44MB 3.5" Internal Floppy Drive FD1231T. It has reliable rugged die-cast frame, ndependent shutter and bezel design. The disk drive easy to install into any available 3.5" drive bay.
Specifications:
5502184
| Item | Rating |
| Power requirement | Voltage | +5.0 V
(4.5 - 5.5 V) |
| Operating current | Seek | 1,080 mA (maximum)
725 mA (typical) |
| Read | 405 mA (maximum)
280 mA (typical) |
| Standby | 9.5 mA (maximum)
3 mA (typical) |
| At motor start | 1,000 mA (maximum)
700 mA (typical) |
| Power consumption | Standby | 0.015 W (typical) |
| Steady | 1.4 W (typical) |
| Functional Specifications |
| High density
2.0-MB mode | High density
1.6-MB mode | Normal density
1.0-MB mode |
| Unformatted recording capacity | 2.00/1.00 MB | 1.67/0.83 MB | 1.00/0.50 MB |
| Formatted recording capacity | 1,440 KB (512-byte, 18-sector)
720 KB (256-byte, 18-sector) | 1,280 KB (1,024-byte, 8-sector)
640-KB (512-Byte, 8-Sector) | 640 KB (256-byte, 16-sector)
320 KB (128-byte, 16-sector)(typical) |
Data transfer rate (MFM/FM)
(inner most track) | 500/250 Kbps | 500/250 Kbps | 250/125 Kbps |
| Disk speed | 300 rpm | 360 rpm | 300 rpm |
| Number of tracks | 160 (80 tracks × 2 sides) | 160 (80 tracks × 2 sides) | 160 (80 tracks × 2 sides) |
| Maximum bit density | 15,916/7,958 ftprad
(17,434/8,717 bpi) | 13,262/6,631 ftprad
(14,528/7,264 bpi) | 7,958/3,979 ftprad
(8,717/4,359 bpi) |
| General Specifications |
| Seek time (track to track) | 3 ms |
| Head setting time | 15 ms |
| Tracks density | 5.33 tpmm (135 TPI) |
| Recording mode | MFM/FM |
| Start time | 500 ms |
| Media - high density mode | 3.5-inch double sided high-density disks (2HD) |
| Media - normal density mode | 3.5-inch double sided double density disks (2DD) |
| Dimensions (H × W × D) | 25.4 × 101.6 × 146 mm (without bezel)
25.4 × 101.6 × 150 mm (with bezel) |
| Weight | 430 g |
| Operating temperature | 4 to 50° C |
| Non-operating temperature | –20 to 60° C |
| Operating humidity | 20 to 80% |
| Non-operating humidity | 10 to 90% |
| Reliability specifications |
| MTTF | 15,000 POH |
| Soft error rate (recoverable) | 10 9 time/bit |
| Hard error rate (unrecoverable) | 10 12 Time/bit |
| Number of medium drive loading | 15,000 or more times |
| Disk life (passes/track) | 3 × 10 6 |