From: Eric Sandeen <sandeen@sandeen.net>
To: Jan Engelhardt <jengelh@computergmbh.de>
Cc: xfs@oss.sgi.com
Subject: Re: Volume too big
Date: Sat, 19 Jan 2008 15:26:26 -0600 [thread overview]
Message-ID: <47926B02.709@sandeen.net> (raw)
In-Reply-To: <Pine.LNX.4.64.0801192200390.4780@fbirervta.pbzchgretzou.qr>
Jan Engelhardt wrote:
> On Jan 19 2008 14:41, Eric Sandeen wrote:
>> It's possible that btrfs can cope with this somehow - but also quite
>> possible that it's just missing the right checks :)
>>
> I am not sure why Linux would be limited to 16 TB. If LBD is on,
> things are 64 bit, so I would expect to have at least access to
> 2 exabyte.
64-bit sector addressing, but there is a 32-bit index into the (4k)
pagecache.
2^32 * 4096 is 16T
So an address space has a 16T limit.
Even mkfs, if it needs to write past 16T (and I think mkfs.btrfs doesn't
need that...) will have trouble, if the device is > 16T - unless mkfs
uses direct IO.
-Eric
next prev parent reply other threads:[~2008-01-19 21:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-19 15:53 Volume too big Jan Engelhardt
2008-01-19 16:15 ` Eric Sandeen
2008-01-19 17:29 ` Justin Piszcz
2008-01-19 18:04 ` Jan Engelhardt
2008-01-19 17:53 ` Jan Engelhardt
2008-01-19 20:12 ` Eric Sandeen
2008-01-19 20:41 ` Eric Sandeen
2008-01-19 21:01 ` Jan Engelhardt
2008-01-19 21:26 ` Eric Sandeen [this message]
2008-01-20 22:03 ` Eric Sandeen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=47926B02.709@sandeen.net \
--to=sandeen@sandeen.net \
--cc=jengelh@computergmbh.de \
--cc=xfs@oss.sgi.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.