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PULSAR.2 SAS PRODUCT MANUAL, REV. C 10
4.0 PERFORMANCE CHARACTERISTICS
This section provides detailed information concerning performance-related characteristics and features of Pulsar.2 drives.
Note. Data provided is based on format at 512-bytes.
4.1 INTERNAL DRIVE CHARACTERISTICS
Drive capacity 800400 200100 GB
(formatted, rounded off value)
Flash Memory Type NAND MLC
Emulated LBA Size 512, 520, 524, 528, 4096, 4160, 4192, or 4224
Native Programmable
Page Size 8192 User Bytes
Default Transfer
Alignment Offset 0
4.2 PERFORMANCE CHARACTERISTICS
See Section 11.4.1, "SAS physical interface" and the SAS Interface Manual (part number 100293071) for additional timing details.
4.2.1 Access time
Access measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The
specifications in the table below are defined as follows:
•
Page-to-page access time is an average of all possible page-to-page accesses in both directions for a sequentially preconditioned
drive.
• Average access time is a true statistical random average of at least 5000 measurements of accesses between programmable
pages on a randomly preconditioned drive.
4.2.2 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.
Table 5
Maximum FORMAT UNIT Times (minutes)
CONFIGURATION
Format Mode DCRT Bit IP Bit 800GB 400GB 200GB 100GB
Non-SED (Default) Thin Provisioned DCRT = 0 IP = 0 5 5 5 5
Non-SED (Default) Thin Provisioned DCRT = 1 IP = 0 5 5 5 5
Non-SED Fully Provisioned DCRT = 0 IP = 1 430 130 70 60
Non-SED Fully Provisioned DCRT = 1 IP = 1 280 100 50 30
SED (Default) Thin Provisioned DCRT = 0 IP = 0 5 N/A N/A N/A
SED (Default) Thin Provisioned DCRT = 1 IP = 0 5 N/A N/A N/A
SED Fully Provisioned DCRT = 0 IP = 1 430 N/A N/A N/A
SED Fully Provisioned DCRT = 1 IP = 1 280 N/A N/A N/A
Table 4 Typical Access Time (μsec)
800GB
1
,
2
1. Execution time measured from receipt of the Command to the Response.
2. Assumes no errors.
3. Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as measured on a
representative sample of drives.
Note. These drives are designed to provide the highest possible performance under typical conditions.
However, due to the nature of Flash memory technologies there are many factors that can result in
values different than those stated in this specification
2.
400, 200, 100 GB
1,2
READ WRITE READ WRITE
Average
Typical
3
293 137 227 120
Page to Page 62 136 60 120
Average Latency 273 206