Performance Characteristics; Internal Drive Characteristics (Transparent To User); Scsi Performance Characteristics (Visible To User); Access Time - Seagate ST39173N Product Manual

Barracuda 9LP Product Manual, Rev. C
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
Recording code
4.2

SCSI performance characteristics (visible to user)*

The values given in Section 4.2.1 apply to all models of the Barracuda 9LP family unless otherwise specified.
Refer to Section 9.10 and to the SCSI Interface Product Manual , part number 77738479, for additional timing
details.
4.2.1

Access time [8]

Average – Typical [3]
Single Track – Typical [3]
Full Stroke – Typical [3]
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. [4]* 15.2 MByte/sec
Avg. [4] 20.4 MByte/sec
Max. [4] 23.7 MByte/sec
Data buffer transfer rate to/from disc media: (< 1 track):
Min. [4] 10.8 MByte/sec
Avg. [4] 16.0 MByte/sec
Max. [4] 17.0 MByte/sec
*[ ] All notes for Section 4.2 are listed at end of Section 4.2.3.
ST39173 ST34573
9,100 4,550
10 5
155,000 155,000
1,165 1,165
7,501 7,501
8,250 8,250
180 180
120-190 120-190
7,200 7,200
4.17 4.17
16/17 16/17
Including controller overhead
(without disconnect) [1] [4]
Drive level
Read
msec
7.4
1.1
16
ST39173
40
20
1 to 1
divided by (interleave factor)
divided by (interleave factor)
divided by (interleave factor)
GByte (formatted, rounded off values)
Bytes (average, unformatted, rounded off values)
Mbytes (unformatted, rounded off values)
Tracks (user accessible)
TPI
KBPI
Mbits/sec (variable with zone)
r/min
msec
EPR4
Write
8.2
1.4
18
ST34573
25
13
9