Date: Fri, 17 Sep 2004 20:09:59 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Brooks Davis <brooks@one-eyed-alien.net> Cc: Ceri Davies <ceri@submonkey.net> Subject: Re: cvs commit: src/sys/sys mdioctl.h src/sys/dev/md md.c src/sbin/mdconfig Makefile mdconfig.8 mdconfig.c Message-ID: <20040917180959.GU30151@darkness.comp.waw.pl> In-Reply-To: <20040917171503.GB10367@odin.ac.hmc.edu> References: <98480.1095438391@critter.freebsd.dk> <414B10FB.9030003@samsco.org> <20040917170302.GT30151@darkness.comp.waw.pl> <20040917171503.GB10367@odin.ac.hmc.edu>
next in thread | previous in thread | raw e-mail | index | archive | help
--J5t7AdsM0Crl/DA3
Content-Type: text/plain; charset=iso-8859-2
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
On Fri, Sep 17, 2004 at 10:15:03AM -0700, Brooks Davis wrote:
+> > Pages. It gives as maximum swap-backed device of 16TB. I tested it with
+> > ~15TB devices, so there is no signed/unsigned problem (which will limit
+> > us to 8TB). Of course you can always (I hope) increase page size:)
+>=20
+> Given my quick read of the sunlabel format, there would be some value in
+> >16TB (17 would be sufficent) virtual disks. Can we do a RAID0 of these
+> to get something that big? I'm pretty sure sunlabel is limited to 14TB
+> or 16TB so having something too big would be good for testing.
You mean setup raid0 with md(4) device to get more than 16TB? Sure, at
least with gstripe:
ragepxe:root:~# diskinfo -v /dev/stripe/foo
/dev/stripe/foo
512 # sectorsize
2111062324805632 # mediasize in bytes (1.9P)
4123168603136 # mediasize in sectors
ragepxe:root:~# gstripe list
Geom name: foo
State: UP
Status: Total=3D128, Online=3D128
Type: AUTOMATIC
Stripesize: 4096
ID: 2239096935
Providers:
1. Name: stripe/foo
Mediasize: 2111062324805632 (1.9P)
Sectorsize: 512
Mode: r0w0e0
Consumers:
1. Name: md0
Mediasize: 16492674416640 (15T)
Sectorsize: 512
Mode: r0w0e0
Number: 0
[...]
128. Name: md127
Mediasize: 16492674416640 (15T)
Sectorsize: 512
Mode: r0w0e0
Number: 127
1.9 Petabytes will be enough?:) Hehe, great fun BTW.:)
--=20
Pawel Jakub Dawidek http://www.FreeBSD.org
pjd@FreeBSD.org http://garage.freebsd.pl
FreeBSD committer Am I Evil? Yes, I Am!
--J5t7AdsM0Crl/DA3
Content-Type: application/pgp-signature
Content-Disposition: inline
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (FreeBSD)
iD8DBQFBSyh3ForvXbEpPzQRAiovAKCLehhcYUSTOss7zocqTDJ0s2mDNACgyY7o
+bDoL8I55tR5uVJjmR0aN1c=
=Xdjt
-----END PGP SIGNATURE-----
--J5t7AdsM0Crl/DA3--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040917180959.GU30151>