From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 28 Jul 2005 12:32:18 -0500 From: AJ Lewis Subject: Re: [linux-lvm] how to access the partition on LV? Message-ID: <20050728173218.GH4954@null.msp.redhat.com> References: <1122563861.9888.1.camel@localhost.localdomain> <20050728164523.GF4954@null.msp.redhat.com> <1122570830.9888.10.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="GXtmylMy6DdaH5oR" Content-Disposition: inline In-Reply-To: <1122570830.9888.10.camel@localhost.localdomain> Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: Ming Zhang Cc: LVM general discussion and development --GXtmylMy6DdaH5oR Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jul 28, 2005 at 01:13:50PM -0400, Ming Zhang wrote: > On Thu, 2005-07-28 at 11:45 -0500, AJ Lewis wrote: > > On Thu, Jul 28, 2005 at 11:17:41AM -0400, Ming Zhang wrote: > > > I think this is a very common question but i can not find the answer. > > > any idea on how to access the partition on these lv since no device > > > node? > > >=20 > > >=20 > > > [root@fc3-i386-2 ~]# fdisk /dev/vg1/v1 -l > > >=20 > > > Disk /dev/vg1/v1: 469 MB, 469762048 bytes > > > 255 heads, 63 sectors/track, 57 cylinders > > > Units =3D cylinders of 16065 * 512 =3D 8225280 bytes > > >=20 > > > Device Boot Start End Blocks Id System > > > /dev/vg1/v1p1 1 13 104391 83 Linux > > > /dev/vg1/v1p2 14 57 353430 83 Linux > >=20 >=20 > the problem is that we export a LV via iscsi to a remote box and become > a scsi disk. so it is partitioned and utilized. then it does have > partition on it. even it is exported to a linux box, u possibly will > use /dev/sdx1 instead of directly use /dev/sdx, rite? Ahh - I see. Well, on the node exporting the LVs, you don't access it. I dunno if kpartx or some other partitioning tool could do it - it might. But as far as the standard partion handling code goes, LVs don't exist. I know why you're doing it this way - I don't know why you want to access the partitions on the exporting (target) node. Do you really need to? =20 > > You don't. Don't put partition tables on LVs. The whole point of using > > LVM is you don't need to partition anymore, and your block devices can = be > > dynamic. If you another block devices, you lvcreate it. If you don't > > have enough space in your VG, you add a PV to it, then lvcreate the new > > block device. Have you read through the HOWTO referenced below? >=20 > i can not see this HOWTO, where u referenced it? It's at the bottom of all messages that go to the linux-lvm ML - http://tldp.org/HOWTO/LVM-HOWTO/=20 --=20 AJ Lewis Voice: 612-638-0500 Red Hat E-Mail: alewis@redhat.com One Main Street SE, Suite 209 Minneapolis, MN 55414 =20 Current GPG fingerprint =3D D9F8 EDCE 4242 855F A03D 9B63 F50C 54A8 578C 8= 715 Grab the key at: http://people.redhat.com/alewis/gpg.html or one of the many keyservers out there... --GXtmylMy6DdaH5oR Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFC6Rai9QxUqFeMhxURAoIPAJ9m1QDXsF4nVzMsuDaMbgoY61zhfgCeLbFk 3Yloqyhtl+WFkyMXXruoW/I= =ZhTL -----END PGP SIGNATURE----- --GXtmylMy6DdaH5oR--