Seagate ST200FX0002 ユーザーズマニュアル
12
Pulsar XT.2 SAS Product Manual, Rev. B
5.2.2
FORMAT UNIT command execution time for 512-byte LBA’s (minutes)
The device may be formatted as either a Thin Provisioned device or a Fully Provisioned device. The default
format is Thin Provisioned and is recommended for most applications. Thin Provisioning provides the most
flexibility for the device to manage the flash medium to maximize endurance.
format is Thin Provisioned and is recommended for most applications. Thin Provisioning provides the most
flexibility for the device to manage the flash medium to maximize endurance.
Table 5:
Maximum FORMAT UNIT Times
(minutes)
Configuration
Format Mode
DCRT Bit
IP Bit
400GB
200GB
100GB
Non-SED
(Default) Thin Provisioned
DCRT = 0
IP = 0
5
5
5
Non-SED
(Default) Thin Provisioned
DCRT = 1
IP = 0
5
5
5
Non-SED
Fully Provisioned
DCRT = 0
IP = 1
140
60
30
Non-SED
Fully Provisioned
DCRT = 1
IP = 1
100
40
20
SED
(Default) Thin Provisioned
DCRT = 0
IP = 0
5
N/A
N/A
SED
(Default) Thin Provisioned
DCRT = 1
IP = 0
5
N/A
N/A
SED
Fully Provisioned
DCRT = 0
IP = 1
140
N/A
N/A
SED
Fully Provisioned
DCRT = 1
IP = 1
100
N/A
N/A
5.2.3
Performance
Table 6:
Performance
Notes
400GB
200GB
100GB
Maximum Burst Transfer Rate
600MB/s
Peak sequential 128KB read/write data transfer rate (MB/s max)
360/300
Sustained sequential 128KB read/write data transfer rate (MB/s)
300/300
300/200
300/100
Peak 4KB random read/write command rate (IOPs)
48,000/22,000
Sustained 4KB random read/write command rate (IOPs)
48,000/
22,000
22,000
48,000/
16,000
16,000
48,000/
8000
8000
Sustainable 4KB Random combined IOPS for 5 year Endurance
(65%/35% R/W, 70% Duty Cycle)
31,000
31,000
31,000
[1]
Testing performed at Queue Depth = 32, Sequentially Preconditioned drive, using IOMeter 2006.7.27.
[2]
Testing performed at Queue Depth = 32, Randomly Preconditioned drive, using IOMeter 2006.7.27.
[3]
Testing performed at Queue Depth = 32, Non-Preconditioned drive, using IOMeter 2006.7.27.
Note.
ttp://www.iometer.org/
http://sourceforge.net/projects/iometer/
.
IOMeter is licensed under the Intel Open Source License and the GNU General Public License. Intel
does not endorse any IOMeter results.
does not endorse any IOMeter results.
Peak performance is defined as the typical best case performance that the product will be able to
achieve when the product is preconditioned as mentioned and host commands are aligned on 4KB
boundaries.
Sustained performance is defined as the typical worst case performance that the product will be able to
achieve when the product is preconditioned as mentioned and host commands are aligned on 4KB boundar-
ies. Write values also take into account the worst case performance throttling that may occur to ensure the
product meets specified reliability specifications.
achieve when the product is preconditioned as mentioned and host commands are aligned on 4KB boundar-
ies. Write values also take into account the worst case performance throttling that may occur to ensure the
product meets specified reliability specifications.