Re: Minix uses 4GB HD at most?
- From: "Fred J. Scipione" <fjscipio@xxxxxxxxxxxxxxxx>
- Date: Sat, 24 Jun 2006 16:16:22 GMT
"Ben Gras" <beng@xxxxxxxxx> wrote in message
news:slrne9f9rb.p3q.beng@xxxxxxxxxxxxxxxx
All,
4GB is a limit, but not directly of the Minix filesystem. It is a
limit
of the FS <-> device driver protocol. The FS talks to the device
drivers using minor device numbers, offsets in bytes (32 bit), and
sizes (32 bit).
I expect the filesystem to be able to work with 2^32 blocks, where
each
block size is determined at mkfs time (4kB is the current default).
That would give rise to filesystems larger than any current disk.
The AT driver can completely address disks using LBA48.
But in Feb. of 2002 Fred J. Scipione wrote in message
news:qsj54a.pkd.ln@xxxxxxxxxxxxxxxxxx
Any one else notice "Moore's Law" at work here? If the 2.0.3 fix
uses 32 bit sector indexes (in place of 32 bit byte indexes) it
should only hold up for about 5-6 years. If the fix switched to
64 bit integers, it might last 23 to 30 years :-).
Hmmm, only 4.4 years. Moore must be picking up speed! :-). Going
from units of 512 byte sectors (9 bits) to 4K byte blocks (12 bits)
only buys about (12-9)*3/2 => 3-5 years; from bytes to blocks about
12*3/2 => 18 years. Don't we live in a wonderful age of rapid
progress?
.
- References:
- Re: Minix uses 4GB HD at most?
- From: Bill Marcum
- Re: Minix uses 4GB HD at most?
- From: Ben Gras
- Re: Minix uses 4GB HD at most?
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