Date: Tue, 11 Dec 2007 15:52:58 -0700 From: "Mark Carlson" <carlsonmark@gmail.com> To: "Ivan Voras" <ivoras@freebsd.org> Cc: freebsd-fs@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: large disk > 8 TB Message-ID: <bab706780712111452r659257bvdd316e73b1c17a9@mail.gmail.com> In-Reply-To: <fjn195$v18$1@ger.gmane.org> References: <475D7866.1070803@hangwithme.com> <475D7D60.4040701@fuckner.net> <fjn195$v18$1@ger.gmane.org>
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On 12/11/07, Ivan Voras <ivoras@freebsd.org> wrote: > Michael Fuckner wrote: > > Lan Tran wrote: > >> I have a Dell PERC 6/E controller connected to an external Dell MD1000 > >> storage, which I set up RAID 6 for. The RAID BIOS reports 8.5 TB. I > >> installed 7BETA4 amd64 and Sysinstall/dmesg.boot detects this correctly: > >> mfid1: <MFI Logical Disk> on mfi1 > >> mfid1: 8578560MB (17568890880 sectors) RAID volume 'raid6' is optimal" > >> > >> However, after I created a zfs zpool on this device it only shows 185 > >> GB. # zpool create tank /dev/mfid1s1d > >> # zpool list > >> NAME SIZE USED AVAIL CAP HEALTH ALTROOT > >> tank 185G 111K 185G 0% ONLINE - > >> > >> also with 'dh': > >> # df -h tank > >> Filesystem Size Used Avail Capacity Mounted on > >> tank 182G 0B 182G 0% /tank > >> > > > > The main purpose of ZFS is doing Software raid (which is even faster > > than HW Raid nowadays). > > > > You should export all disks seperately to the OS- and then you don't > > have the 4GB limit wrapping the size to 185GB. > > This is the wrong way around. Why would something wrap drive sizes at a > 32-bit limit? The driver and the GEOM systems are 64-bit clean, if this > is a problem in ZFS, it's a serious one. > > I don't have the drive capacity to create a large array, but I assume > someone has tested ZFS on large arrays (Pawel?) If there is a bug here, I'm not sure people will see it for a while in practice. I mean, who is using hardware raid to create a 8.5GB "disk" then create a zpool with that one "disk"? In this case, it appears there was some misconfiguration that has been remedied: hardware raid seems to have been disabled now, and all the disks are exported seperately to create a zpool with, resulting in success. > Can you run "diskinfo -v " on the large array (the 8.5 TB one) and > verify the system sees it all?
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