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Re: Disks w/non-512-byte sectors?
On Jan 19, 2015, at 3:09 AM, Michael van Elst wrote:
I was just reading that the ECC is improved, and possibly more
efficient with the 4k sectors.
Instead of 512 bytes of data, and so many bytes for ECC. Now the ECC
is over the 4k, and
I was of the impression that the 4K sector business was to address(!)
the problem of disk capacity outrunning the addressing capacity of
Task File interface on IDE/PATA/SATA disks, evening with all the
bit reassignments to squeeze out more address space and LBA tricks.
Current disks have LBA48, 48bit to address a sector. That's 128
(131072 Terabytes) with 512-byte sectors.
The above sounds like it's just a performance issue at the DAC level.
The larger sectors reduce per-sector command overhead and also squeeze
a few bits more onto the disk.
can correct more errors.
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