large disk > 8 TB

[Ivan Voras]

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?)

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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