G
Graeme
DevilsPGD said:
Is that sustained for the whole of the disk, or just on the outer tracks?
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Is that sustained for the whole of the disk, or just on the outer tracks?
K
kony
DevilsPGD said:In message <[email protected]> "Joris
Dobbelsteen said:[snip]
SATA technology has the
potential to be much faster than EIDE (ATA) drive technology
[snip]
Currently the speeds are 133 MB/s for IDE and 150 MB/s for SATA. I don't
know any drive that reached these speeds (two IDE disks on the same channel
might just come close, thats where the second channel is for).
WD Raptors can do ~77MB/s sustained. Burst speeds are much higher,
especially if the data is being cached by the drive.
Is that sustained for the whole of the disk, or just on the outer tracks?
Outer tracks, but sustained throughput can be nearly same
with a very large drive, keeping the data on limited first
partition (which could still provide the entire 74GB if
necessary). The Raptor's other benefit is the higher RPM
(compared to only ATA or SATA) reducing latency.
D
DevilsPGD
In message <[email protected]> "Graeme"
IIRC it was ~60MB/s to ghost the entire drive from one Raptor to
another. The drive had less then a GB free at the time (I was moving
from a RAID-0 array to running the drives independently -- I moved the
data from the RAID array to an IDE drive, then restored it to the wrong
Raptor. Rather then restoring from the IDE drive *again* I tried a
Raptor --> Raptor image)
Is that sustained for the whole of the disk, or just on the outer tracks?
IIRC it was ~60MB/s to ghost the entire drive from one Raptor to
another. The drive had less then a GB free at the time (I was moving
from a RAID-0 array to running the drives independently -- I moved the
data from the RAID array to an IDE drive, then restored it to the wrong
Raptor. Rather then restoring from the IDE drive *again* I tried a
Raptor --> Raptor image)
J
Joris Dobbelsteen
DevilsPGD said:In message <[email protected]> "Joris
Dobbelsteen said:[snip][snip]SATA technology has the
potential to be much faster than EIDE (ATA) drive technology
Currently the speeds are 133 MB/s for IDE and 150 MB/s for SATA. I don't
know any drive that reached these speeds (two IDE disks on the same channel
might just come close, thats where the second channel is for).
WD Raptors can do ~77MB/s sustained. Burst speeds are much higher,
especially if the data is being cached by the drive.
You don't use burst normally over the IDE channel. Usually that caching
space if very small and you will use the much bigger RAM for that purpose,
which has way over 1 GB/s of bandwidth on modern computers.
Sustained speeds are well within the bandwidth of both busses, provided you
connect only a single disk on a IDE channel.
- Joris