Performance Characteristics; Internal Drive Characteristics (Transparent To User); Scsi Performance Characteristics (Visible To User); Access Time - Seagate ST336737LW Product Manual

Barracuda 36ES Product Manual, Rev. H
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 4.17
4.2

SCSI performance characteristics (visible to user)

The values given in Section 4.2.1 apply to all models of the Barracuda 36ES family unless otherwise specified.
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]

Average – Typical [2]
Single Track – Typical [2]
Full Stroke – Typical [2]
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]* 28.1
Avg. [3] 42.0
Max. [3] 50.7
SCSI interface data transfer rate (asynchronous):
Maximum instantaneous one byte wide
Maximum instantaneous two bytes wide
Synchronous formatted transfer rate
In single-ended (SE) interface mode
In low voltage differential (LVD) interface mode
ST336737 ST318437
36.954 18.400
4 2
384 384
9,176 9,176
29,850 29,850
32,197 32,197
490.9 490.9
308-498 308-498
7,200 7,200
4.17
Including controller overhead
(without disconnect) [1] [3]
Drive level
Read Write
msec
8.7 9.3
0.6 0.7
15.1 15.7
ST336737
36.5
18.5
1 to 1
Mbytes/sec
Mbytes/sec
Mbytes/sec
ST318417
18.400 Gbytes (formatted, rounded off)
2
384 KBytes (average, rounded off)
9,176 Mbytes (unformatted, rounded off)
29,850 Tracks (user accessible)
32,197 TPI
490.9 KBPI
308-498 Mbits/sec (variable with zone)
7,200 r/min (+0.5%)
4.17 msec
Not including controller overhead
(without disconnect) [1] [3]
Drive level
Read
8.5
0.4
14.9
ST318437 ST318417
18.5
9.5
5.0 Mbytes/sec [4]
10.0 Mbytes/sec [4]
Ultra2 SCSI
5.0 to 40 Mbytes/sec
5.0 to 80 Mbytes/sec
Write
msec
9.1
0.5
15.5
18.5
9.5
Ultra160 SCSI
5.0 to 80 Mbytes/sec
5.0 to 160 Mbytes/sec
9