4.5.5 Data transfer speed
320
68/80pin Ultra 320
Buffer-Host
146-GB Model 33.9
73-GB Model 33.9
36-GB Model 33.8
18-GB Model 45.9
Sustained
All models 37.5
Instantaneous
Disk-Buffer Transfer (Zone 16)
146-GB Model 66.7
73-GB Model 66.6
36-GB Model 66.4
18-GB Model 66.2
Sustained
All models 73.7
Instantaneous
Disk-Buffer Transfer (Zone 0)
Typical (Mbyte/s)
Description
Figure 14. Data transfer speed (sector size 512 bytes case)
!
Instantaneous disk-buffer transfer rate is derived by
(Number of sectors on a track)*512*(revolution/sec)
NOTE: The number of sectors per track varies because of the linear density recording.
!
Sustained disk-buffer transfer rate is defined by considering head/cylinder change time. This gives a
local average data transfer rate. It is derived by
(Sustained Transfer Rate) = A/(B +C)
A = (Number of data sectors per cylinder) * 512
B = Average track change time
C = (# of Surface) * (One revolution time)
!
Buffer-host transfer rate defines the maximum data transfer rate on SCSI Bus. It also depends on the
speed of the host.
4.5.6 Buffering operation (read ahead/write cache)
This hard disk drive has a buffer for read ahead and write caching. For details, refer to the SCSI interface
specification.
Ultrastar 146Z10 hard disk drive specifications
15
Содержание IC35L018UCDY10
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