 
Part Numbers and Options
| M2541B (128KB buffer) |
CA01341-B550 |
| M2541B (512KB buffer) |
CA01341-B575 |
Functional Specifications
| Model |
M2541BA/BB/BC/BD |
| Disk
Format |
90
mm MO disk
(ISO 10090) |
90
mm MO disk
(ISO 13963) |
| Storage
Capacity |
unformatted |
181
MB |
325
MB |
| formatted |
325
MB |
230
MB |
| Zones |
- |
10 |
| Track
capacity (formatted) |
12,800
Bytes |
12,800
Bytes (logical) |
| Track
/side |
10,000 |
17,940
(logical) |
| Sectors
Per Track |
25 |
25
(logical) |
| Direct
overwrite support |
None |
M2541Bx01/51:
None
M2541Bx25/75: Yes |
| Sector
Capacity (formatted) |
512
Bytes |
| Seek Time
* |
1/3 stroke |
less
than 70 milliseconds |
| full stroke |
less
than 140 milliseconds |
| Average
latency time |
11.1
milliseconds |
| Rotational
speed |
2,700
rpm |
| Recording
Density |
24,400
BPI |
29,300
BPI |
| Track
density |
15,875
TPI |
18,256
TPI |
| Data
Transfer Rate |
Model |
Bx01/51/25/75 |
Bx01/51 |
Bx25/75 |
| to/from
media (max.) |
0.8
MB/s |
1.0
to 1.6 |
| (continuous
write) |
0.19
MB/s |
0.23 to 0.36 |
0.35 to 0.55 |
| (continuous
read) |
0.57
MB/s |
0.69 to 1.1 |
0.69 to 1.1 |
| to/from host |
8MB/s
with IORDY, 6MB/s without IORDY |
| Recording
Code |
RLL
(2/7) |
| Interface |
ATA-2 |
| Head
positioning method |
Direct
Tracks Count |
| Load time |
less
than 7 sec |
| Unload
time |
less
than 6 sec |
| Buffer
size |
model
Bx01/25 |
128KB |
| model
Bx51/75 |
512KB |
* Each seek time specified here is
the mathematical average of 1000 times of seek and does
not include interface overhead nor track address
recognition time.
Physical Specifications
| Power
requirements ** |
operating |
4.2 W (R/W,
seek) |
| sleep mode |
less than 0.1 W |
| Dimensions |
height |
17.2 mm |
| width |
101.6 mm |
| depth |
140.0 mm |
| Weight |
less than 300 g |
| Ambient
temperature |
operating |
5 to 45 °C |
| not
operating |
0 to 50 °C |
| gradient |
15 °C/h
(operating) |
| Relative
humidity |
operating |
10 to 85 %, not
condensing |
| not
operating |
10 to 85 %, not
condensing |
| Vibration |
operating |
0.4 G (5 to 500
Hz, sine sweep) |
| not
operating |
0.6 G (5 to 500
Hz, sine sweep) |
| Shock |
operating |
2.0 G (10 ms,
half sine pulse) |
| idle |
5 G (10 ms,
half sine pulse) |
| transport |
100 G (5 ms,
half sine pulse) |
| Altitude |
operating |
less than 3,000
m |
| not
operating |
less than
12,000 m |
| Acoustic
Noise |
- |
** 5 VDC +/-5%, 0.9A ave. 1.5 A
peak, (R/W, random seek). Maximum value excludes peak
current less than 500 µsec duration.
Reliability Specifications
| Mean Time Between
Failures (MTBF) |
40,000 power on
hours |
| Mean Time To Repair
(MTTR) |
Less than 30
minurtes |
| Component Life |
5 years |
| Recoverable errors |
10 per 10^5
bits read |
| Unrecoverable errors |
10 per 10^13
bits read |
| Seek errors |
10 per 10^7
seeks |
|
