Seagate ST318405LW/LC ユーザーズマニュアル
Cheetah 36XL Product Manual, Rev. E
9
4.0
Performance characteristics
4.1
Internal drive characteristics (transparent to user)
4.2
SCSI performance characteristics (visible to user)
The values given in Section 4.2.1 apply to all models of the Cheetah 36XL family unless otherwise specified.
Refer to Section 9.10 and to the
Refer to Section 9.10 and to the
SCSI Interface Product Manual, part number 75789509, for additional timing
details.
4.2.1
Access time [5]
4.2.2
Format command execution time (minutes) [1]
4.2.3
Generalized performance characteristics
Data buffer transfer rate to/from disc media (one contiguous 512-byte sector):
Data buffer transfer rate to/from disc media (<1 track)
ST336705
ST318405
ST39205
Drive capacity
36.704
18.352
9.176
GByte (formatted, rounded off values)
Read/write heads
8
4
2
Bytes/track
241,128
241,128
241,128
Bytes (average, rounded off values)
Bytes/surface
4,577.5
4,577.5
4,577.5
Mbytes (unformatted, rounded off values)
Tracks/surface (total)
19,036
19,036
19,036
Tracks (user accessible)
Tracks/inch
24,406
24,406
24,406
TPI
Peak bits/inch
381.28
381.28
381.28
KBPI
Internal data rate
320-490
320-490
320-490
Mbits/sec (variable with zone)
Disc rotational speed
10,022
10,022
10,022
r/min (+0.5%)
Average rotational latency
2.99
2.99
2.99
msec
Including controller overhead
(without disconnect) [1] [3]
(without disconnect) [1] [3]
Not including controller overhead
(without disconnect) [1] [3]
(without disconnect) [1] [3]
Drive level
Drive level
Read
Write
Read
Write
msec
msec
Average—Typical [2]
5.6
6.4
5.4
6.2
Single Track—Typical [2]
1.0
1.4
0.8
1.2
Full Stroke—Typical [2]
10.7
11.2
10.5
11
ST336705
ST318405
ST39205
Maximum (with verify)
36
18
9
Maximum (no verify)
19
9.5
4.5
Minimum sector interleave
1 to 1
Minimum [3]
31 MByte/sec
Average [3]
43 MByte/sec
Maximum [3]
50 MByte/sec
Minimum [3]
29 MByte/sec
Average [3]
40 MByte/sec
Maximum [3]
46 MByte/sec