Performance Characteristics; Internal Drive Characteristics; Format Command Execution Time For 512-Byte Sectors (Minutes); General Performance Characteristics - Seagate ST900MM0006 Product Manual

4.0 P
ERFORMANCE CHARACTERISTICS
This section provides detailed information concerning performance-related characteristics and features of Savvio drives.
4.1 I
NTERNAL DRIVE CHARACTERISTICS
ST900MM0006
ST900MM0026
ST900MM0046
ST900MM0036
Drive capacity 900
Read/write data heads 6
Bytes per track 997.9
Bytes per surface 151,674
Tracks per surface (total) 152
Tracks per inch 279
Peak bits per inch 1925
Areal density 538
Disk rotation speed 10K
Avg rotational latency 2.9
4.2 P
ERFORMANCE CHARACTERISTICS
See Section 11.4.1, "SAS physical interface" on page 58 and the SAS Interface Manual (part number 100293071) for
additional timing details.
4.2.1

Format command execution time for 512-byte sectors (minutes)

Maximum (with verify)
Maximum (without verify)
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.
4.2.2

General performance characteristics

Minimum sector interleave
Data buffer to/from disk media (one 512-byte logical block)*
Sustained transfer rate
SAS Interface maximum instantaneous transfer rate
Logical block sizes
512 (default), 520, 524 or 528.
Read/write consecutive sectors on a track
Flaw reallocation performance impact (for flaws reallocated at format time using the
spare sectors per sparing zone reallocation scheme.)
Average rotational latency
*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
S 10K.6 SAS P
AVVIO RODUCT
ST600MM0006
ST600MM0026
ST600MM0046
600
4
997.9
151,674
152
279
1925
538
10K
2.9
900GB models 600GB models
184
91
M , R . C
ANUAL EV
ST450MM0006 ST300MM0006
ST450MM0026 ST300MM0026
ST450MM0046 ST300MM0046
450 300 GB (formatted, rounded off value)
3 2
997.9 997.9 KBytes (avg, rounded off values)
151,674 151,674 MB (unformatted, rounded off value)
152 152 KTracks (user accessible)
279 279 KTPI (average)
1925 1925 KBPI
538 538 Gb/in2
10K 10K rpm
2.9 2.9 ms
450GB models
122 91
61 46
1 to 1
1.44 to 2.35 Gb/s
119 to 195 MiB/s **
125 to 204 MB/s
600 MB/s* per port
(dual port = 1200 MB/s*)
Yes
Negligible
2.9ms
300GB models
61
31
9