Messages in this thread | | | From | "jdow" <> | Subject | Re: ATA 4 KiB sector issues. | Date | Wed, 17 Mar 2010 01:01:55 -0700 |
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From: "Tejun Heo" <tj@kernel.org> Sent: Tuesday, 2010/March/16 20:44
> Hello, > > On 03/17/2010 11:51 AM, Kevin Easton wrote: >> Can't we fix the problem by defaulting to aligning partitions to >> start on an LBA that is a multiple of 64260 ? >> >> Such partitions will always be 4KiB-aligned, *and* start-of-cylinder >> aligned (assuming 255/63, as seems to be the norm). >> >> Sure, that reduces your partition granularity to almost-32-MiB, but >> that's pretty small potatoes these days (and it's only a *default*, so >> you could always override that if you really cared, and didn't need >> the compatibility). > > The only thing we can gain by that is possible compatibility w/ very > old operating systems (<=w2k, BTW, it would be great if someone can > actually test it). Plus, breaking the first cylinder assumption might > not be always safe to begin with. I personally don't think it's > something worth departing from the behavior most vendors would assume > from now on (1MiB alignment). It should be enough and safer to > provide a mechanism to choose legacy alignment if someone is trying to > put something which is older than a decade there. > > Thanks. > > -- > tejun
WRT very old filesystems - it won't affect Amiga partition tables or the Amiga FFS. It already understands large block sizes natively. And that's MY definition of "old" with "very" in front of it.
{^_^} Joanne Dow
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