We have other systems with RAID5 disk arrays > 2 TB.
There is no problem with a vanilla SL5.3 kernel for these.
It is true that fdisk complains that the disk is big, but it does report
the size correctly. For example:
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk
doesn't support GPT. Use GNU Parted.
WARNING: The size of this disk is 5.0 TB (4998872171008 bytes).
DOS partition table format can not be used on drives for volumes
larger than 2.2 TB (2199023255040 bytes). Use parted(1) and GUID
partition table format (GPT).
Disk /dev/sdb: 4998.8 GB, 4998872171008 bytes
255 heads, 63 sectors/track, 607744 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 267350 2147483647+ ee EFI GPT
The difference is that the above system is a blade server with an onboard
3-ware RAID controller. The device that we are having problems with is an
external enclosure that connects via USB.
Eve
On Sat, 5 Jun 2010, Jimmy Cullen wrote:
> Date: Sat, 5 Jun 2010 06:09:57 +0100
> From: Jimmy Cullen <[log in to unmask]>
> To: Steven Timm <[log in to unmask]>, Eve V. E. Kovacs <[log in to unmask]>,
> [log in to unmask], Sergei Chekanov <[log in to unmask]>
> Subject: Re: storage (fwd)
>
> The kernel that you are using may not be able to see more than 2TB.
> Previously we had a similar problem and solved it by using the XFS
> kernel, which is capable of seeing large volumes. I suggest having a
> look at the SL5.3 release notes to see if there is mention of kernel
> limitations.
>
> Good luck,
>
> Jimmy
>
> On 5 June 2010 02:49, Steven Timm <[log in to unmask]> wrote:
>> If you have more than 2TB you can't use fdisk, need to use parted
>> to see full size of disk. You say it is usb, there could
>> be issues there too. What does lsusb say?
>>
>> Steve
>>
>>
>> On Fri, 4 Jun 2010, Eve V. E. Kovacs wrote:
>>
>>> We have StarTech external multi-bay hard drive enclosure
>>> ( 4x3.5" drives, SATA), S354UFER.
>>> It has 2TB drives and is configured for Raid5.
>>> Disks are partitioned using ext3 (gpt partition table)
>>>
>>> Ubuntu 9.08 works fine: it sees ~6 TB after
>>> connecting it with a USB cable.
>>>
>>> When I connect it to ScientificLinux 5.3, I see only 2 TB
>>> (with fdisk -l) and SL5.3 does not mount it.
>>>
>>> StarTech claims that it works fine with Linux (but they did not
>>> specify an OS or a kernel version)
>>>
>>> Has anyone tried this device or has experience with this type of problem?
>>>
>>> Thanks
>>>
>>>
>>> Sergei Chekanov | WWW : www.hep.anl.gov/chakanau
>>> =============== | Email: [log in to unmask]
>>> HEP Division, ANL | Tel : +01-630-252 6541
>>> 9700 S.Cass,Argonne,IL 60439,USA | Fax : +01-630-252-5782
>>>
>>
>> --
>> ------------------------------------------------------------------
>> Steven C. Timm, Ph.D (630) 840-8525
>> [log in to unmask] http://home.fnal.gov/~timm/
>> Fermilab Computing Division, Scientific Computing Facilities,
>> Grid Facilities Department, FermiGrid Services Group, Assistant Group
>> Leader.
>>
>
***************************************************************
Eve Kovacs
Argonne National Laboratory,
Room E-217, Bldg. 362, HEP
9700 S. Cass Ave.
Argonne, IL 60439 USA
Phone: (630)-252-6208
Fax: (630)-252-5047
email: [log in to unmask]
***************************************************************
|
