Seagate IronWolf Pro SATA +Rescue Product Manual, Rev. A
9
www.seagate.com
Drive specifications
2.2
Formatted capacity
*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary
depending on operating environment and formatting.
NOTE
LBA Counts for drive capacities greater than 8TB are calculated based upon the
SFF-8447 standard publication.
ftp://ftp.seagate.com/sff/SFF-8447.PDF
2.2.1
LBA mode
When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to
n–1,
where
n
is
the number of guaranteed sectors as defined above
.
See
Section 4.3.1, "Identify Device command"
(words 60-61 and 100-103) for additional information about 48-bit
addressing support of drives with capacities over 137GB.
2.3
Recording and interface technology
2.4
Start/stop times
Power-on to ready time is based on typical operating conditions, default full current spin-up profile, and clean
shutdown prior to measurement. To ensure a clean shutdown a Flush Cache, Standby, or Standby Immediate
command must be completed before removal of interface power.
NOTE
An unexpected power loss event, spin up at cold or hot temperature extremes may
cause the drive to exceed the typical and max time to ready by 5 to 20 seconds.
Extended time to ready is dependent on cache state and environmental conditions
prior to the unexpected power loss and during the subsequent power on.
ST models
Formatted
capacity*
Guaranteed
sectors
Bytes per
logical sector
Guaranteed
sectors
Bytes per
logical sector
ST20000NE000
20TB
39,063,650,304
512
(Default)
4,882,956,288
4096
Interface
Serial ATA (SATA)
Recording method
Perpendicular
Recording density, KBPI (Kb/in max)
2470
Track density, KTPI (ktracks/in avg)
482
Areal density (Gb/in
2
avg)
1146
Spindle speed (RPM) (± 0.2%)
7200
Internal data transfer rate (Mb/s max)
2899
Sustained data transfer rate (MiB/s max)
272 (285 MB/s max)
I/O data-transfer rate (MB/s max)
600 (Ultra DMA mode 5)
Power-on to Ready (sec) (typ/max)
25/30
Standby to Ready (sec) (typ/max)
25/30
Ready to spindle stop (sec) (max)
20
