Performance Characteristics; Internal Drive Characteristics (Transparent To User); Scsi Performance Characteristics (Visible To User); Access Time - Seagate ST150176LW Product Manual

Barracuda 50 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 50 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]* 19.1 MByte/sec
Avg. [4] 27.8 MByte/sec
Max. [4] 33.0 MByte/sec
Data buffer transfer rate to/from disc media: (< 1 track):
Min. [4] 14.9 MByte/sec
Avg. [4] 21.7 MByte/sec
Max. [4] 25.7 MByte/sec
*[ ] All notes for Section 4.2 are listed at end of Section 4.2.3.
ST150176
50.07 GByte (formatted, rounded off values)
22
189.28 kbytes (average, rounded off values)
2,276 Mbytes (unformatted, rounded off values)
12,024 Tracks (user accessible)
12,905 TPI
252 KBPI
153 - 264 Mbits/sec (variable with zone)
7,184 r/min
4.17 msec
8/9 EPR4
Including controller overhead
(without disconnect) [1] [4]
Drive level
Read
msec
7.6
0.9
16
ST150176
120
70
1 to 1
divided by (interleave factor)
divided by (interleave factor)
divided by (interleave factor)
Write
8.4
1.2
17
9