Seagate Exos X20z SATA Product Manual, Rev. B
6
www.seagate.com
Drive specifications
1.2
Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. For
convenience, the phrases
the drive
and
this drive
are used throughout this manual to indicate the Exos X20z SATA drive
models.
1.2.1
Specification summary tables
The specifications listed in the following tables are for quick reference. For details on specification measurement or
definition, see the appropriate section of this manual.
Table 1 Drive specifications summary
Drive specification
ST20000NM001J
Formatted (512 bytes/sector)
20TB
Guaranteed sectors
(see
)
Heads
18
Discs
9
Bytes per logical sector
512E
Bytes per physical sector
4096
Recording density, KBPI (Kb/in max)
2480
Track density, KTPI (ktracks/in avg.)
540
Areal density, (Gb/in
2
avg)
1340
Spindle speed (RPM)
7200
Internal data transfer rate (Mb/s max)
2880
Sustained data transfer rate OD (MiB/s max)
249 (260 MB/s max)
I/O data-transfer rate (MB/s max)
600
ATA data-transfer modes supported
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer
256MB (262,144KB)
Weight: (maximum)
670g (1.477 lb)
Average latency
4.16ms
Power-on to ready (sec) (typ/max)
25/30
Standby to ready (sec) (typ/max)
25/30
Startup current (typical) 12V (peak)
2.6A
2.0A (optional configuration through Smart Command Transport)
Voltage tolerance (including noise)
5V ± 5%
12V ± 10%
Operating temperature
5° to 60°C (Drive Reported Temperature)
Non-Operating temperature
–40° to 70°C (Ambient Temperature, see sections 1.3.1 and 1.3.11)
