Performance Characteristics; Internal Drive Characteristics (Transparent To User); Scsi Performance Characteristics (Visible To User); Access Time [5] - Seagate ST336732LC Product Manual

8
4.0

Performance characteristics

4.1

Internal drive characteristics (transparent to user)

Drive capacity
Read/write heads
Bytes/track
Bytes/surface
Tracks/surface (total)
Tracks/inch
Peak bits/inch
Internal data rate
Disc rotational speed
Average rotational latency
4.2

SCSI performance characteristics (visible to user)

The values given in Section 4.2.1 apply to all models of the Cheetah X15 36LP family unless otherwise speci-
fied. Refer to Section 9.10 and to the SCSI Interface Product Manual for additional timing details.
4.2.1

Access time [5]

Average – Typical
Single Track – Typical
Full Stroke – Typical
4.2.2

Format command execution time (minutes) [1]

Maximum (with verify)
Maximum (no verify)
4.2.3

Generalized performance characteristics

Minimum sector interleave
Data buffer transfer rate to/from disc media (one 512-byte sector):
Min. [3]* 51.8
Max. [3] 68.1
SCSI interface data transfer rate (asynchronous):
Maximum instantaneous one byte wide
Maximum instantaneous two bytes wide
Synchronous formatted transfer rate
In low voltage differential (LVD) interface mode
ST336752 and
ST336732
36.7
8
316,155
5,932.5
18,497
38,000
482
548-706
15k
2.0
Including controller overhead
(without disconnect) [1] [3]
Drive level
Read
msec
[2] 3.8
[2] 0.5
[2] 7.2
ST336752 and ST336732
90
45
1 to 1
MBytes/sec
MBytes/sec
Cheetah X15 36LP Product Manual, Rev. D
ST318452 and
ST318432
18.4 GByte (formatted, rounded off values)
4
316,155 Bytes (average, rounded off values)
5,932.5 Mbytes (unformatted, rounded off values)
18,497 Tracks (user accessible)
38,000 TPI
482 KBPI
548-706 Mbits/sec (variable with zone)
15k r/min
2.0 msec
Not including controller overhead
(without disconnect) [1] [3]
Drive level
Write Read
4.4 3.6
0.6 0.3
8.2 7.0
ST318452 and ST318432
5.0 Mbytes/sec [4]
10.0 Mbytes/sec [4]
Ultra160 SCSI
5.0 to 160 Mbytes/sec
Write
msec
4.2
0.4
8.0
60
30
Ultra320 SCSI
5.0 to 320 Mbytes/sec