Internal drive characteristics
|
1800GB
4096 & 512
Emulation |
1200GB
4096 & 512
Emulation |
900GB
4096 & 512
Emulation |
600GB
4096 & 512
Emulation |
Models |
Sector size |
|
Drive capacity
Read/write data heads
Bytes per track
Bytes per surface
Tracks per surface (total)
Tracks per inch
Peak bits per inch
Areal density
Disk rotation speed
Avg rotational latency |
1800
8
1065
227,273
213.4
328
1993
644.6
10K
2.9 |
1200
6
1038
213,991
206.1
316.8
1943
606.9
10K
2.9 |
900
4
1065
227,273
213.4
328
1993
644.6
10K
2.9 |
600
3
1038
202,020
194.6
299
1943
573.0
10K
2.9 |
GB (formatted, rounded off value) |
|
Kbytes (avg, rounded off values)
MB (unformatted, rounded off value)
Ktracks (user accessible, rounded off values)
KTPI (avg, rounded off values)
Kb/in
Gb/in2
rpm
ms |
|
|
|
|
|
|
1200GB
512 |
900GB
512 |
600GB
512 |
300GB
512 |
Models |
Sector size |
|
Native |
Native |
Native |
Native |
|
|
|
Drive capacity
Read/write data heads
Bytes per track
Bytes per surface
Tracks per surface (total)
Tracks per inch
Peak bits per inch
Areal density
Disk rotation speed
Avg rotational latency |
1200
6
947
202,051
213.4
328
1952
619.85
10K
2.9 |
900
6
1031
151,545
147
328
1952
619.85
10K
2.9 |
600
3
947
202,051
213.4
328
1952
619.9
10K
2.9 |
300
3
1109
101,030
91.1
280.3
1952
547.23
10K
2.9 |
GB (formatted, rounded off value) |
|
Kbytes (avg, rounded off values)
MB (unformatted, rounded off value)
Ktracks (user accessible, rounded off values)
KTPI (avg, rounded off values)
Kb/in
Gb/in2
rpm
ms |
|
|
|
|
|
Performance characteristics
|
|
Format command execution time (minutes) |
|
1800GB models 1200GB models 900GB models 600GB models |
|
Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte
Transfer to the Initiator (excluding connect/disconnect).
When changing sector sizes, the format times shown above may need to be increased by 30 minutes.
|
4096-byte sectors |
|
|
Maximum (with verify) |
341 |
222 |
174 |
117 |
|
Maximum (without verify) |
171 |
111 |
87 |
58 |
|
512-byte sectors |
1200GB models 900GB models |
600GB models 300GB models |
|
|
Maximum (with verify) |
249 |
169 |
125 |
54 |
|
Maximum (without verify) |
125 |
85 |
63 |
28 |
Seagate Enterprise Performance 10K HDD v8 w/TurboBoost Product Manual, Rev. D 17
Start/stop time
The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied.
If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT command with
the START bit equal to 0, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure).
If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP)
primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT
command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE
SPINUP) primitive through either port, the drive becomes ready for normal operations within 20 seconds (excluding the error
recovery procedure).
If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a NOTIFY
(ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command.
The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 20 seconds (maximum) from
removal of DC power. SCSI stop time is 20 seconds. There is no power control switch on the drive. However, power can be cycled on
the drive by utilizing SAS Power Disable feature defined by T10 (i.e. drive Pin 3 high).
Prefetch/multi-segmented cache control
The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance
system performance. Cache refers to the drive buffer storage space when it is used in cache operations. To select this feature, the
host sends the Mode Select command with the proper values in the applicable bytes in page 08h. Prefetch and cache operations are
independent features from the standpoint that each is enabled and disabled independently using the Mode Select command;
however, in actual operation, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.
All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in
Section 11.3.2.
|
Sustained transfer rate for 4096 native and 512 emulation |
112 to 230 MiB/s **
117 to 241 MB/s |
|
Sustained transfer rate for 512 native |
103 to 205 MiB/s **
108 to 215 MB/s |
|
SAS Interface maximum instantaneous transfer rate |
1200 MB/s* per port
(dual port = 2400 MB/s*) |
|
Logical block sizes |
|
|
512 emulation and native - 512 (default), 520,524, or 528
4096 native - 4096 (default), 4160, 4192, or 4224 |
|
|
Read/write consecutive sectors on a track |
Yes |
|
Flaw reallocation performance impact (for flaws reallocated at format time using the
spare sectors per sparing zone reallocation scheme.) |
Negligible |
|
Average rotational latency |
2.9ms |
|
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.
** MiB/s x 1.048 = MB/s |
|
|
|
Format command execution time (minutes) |
|
1800GB models 1200GB models 900GB models 600GB models |
|
Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte
Transfer to the Initiator (excluding connect/disconnect).
When changing sector sizes, the format times shown above may need to be increased by 30 minutes.
|
4096-byte sectors |
|
|
Maximum (with verify) |
341 |
222 |
174 |
117 |
|
Maximum (without verify) |
171 |
111 |
87 |
58 |
|
512-byte sectors |
1200GB models 900GB models |
600GB models 300GB models |
|
|
Maximum (with verify) |
249 |
169 |
125 |
54 |
|
Maximum (without verify) |
125 |
85 |
63 |
28 |
Seagate Enterprise Performance 10K HDD v8 w/TurboBoost Product Manual, Rev. D 17
Start/stop time
The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied.
If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT command with
the START bit equal to 0, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery procedure).
If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE SPINUP)
primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a START STOP UNIT
command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive. After receiving a NOTIFY (ENABLE
SPINUP) primitive through either port, the drive becomes ready for normal operations within 20 seconds (excluding the error
recovery procedure).
If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a NOTIFY
(ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command.
The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 20 seconds (maximum) from
removal of DC power. SCSI stop time is 20 seconds. There is no power control switch on the drive. However, power can be cycled on
the drive by utilizing SAS Power Disable feature defined by T10 (i.e. drive Pin 3 high).
Prefetch/multi-segmented cache control
The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance
system performance. Cache refers to the drive buffer storage space when it is used in cache operations. To select this feature, the
host sends the Mode Select command with the proper values in the applicable bytes in page 08h. Prefetch and cache operations are
independent features from the standpoint that each is enabled and disabled independently using the Mode Select command;
however, in actual operation, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.
All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are given in
Section 11.3.2.
|
Sustained transfer rate for 4096 native and 512 emulation |
112 to 230 MiB/s **
117 to 241 MB/s |
|
Sustained transfer rate for 512 native |
103 to 205 MiB/s **
108 to 215 MB/s |
|
SAS Interface maximum instantaneous transfer rate |
1200 MB/s* per port
(dual port = 2400 MB/s*) |
|
Logical block sizes |
|
|
512 emulation and native - 512 (default), 520,524, or 528
4096 native - 4096 (default), 4160, 4192, or 4224 |
|
|
Read/write consecutive sectors on a track |
Yes |
|
Flaw reallocation performance impact (for flaws reallocated at format time using the
spare sectors per sparing zone reallocation scheme.) |
Negligible |
|
Average rotational latency |
2.9ms |
|
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or from the host.
** MiB/s x 1.048 = MB/s |
|
|
![ST900MM0168 Seagate Enterprise Performance 10K v8 900Gb, 10000rpm, SAS 2.5" [Savvio 10K.8] ST 900 MM 0168 10 Gb 10000 rpm](/usr/templates/images/222.id22200000052113.SITE_PICTURE.enterprise-perf-10k-hdd-197x197.jpg "ST900MM0168 Seagate Enterprise Performance 10K v8 900Gb, 10000rpm, SAS 2.5\" [Savvio 10K.8] ST 900 MM 0168 10 Gb 10000 rpm")