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 <[email protected]>
To: Steven Timm <[email protected]>, Eve V. E. Kovacs <[email protected]>,
[email protected], Sergei Chekanov <[email protected]>
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 <[email protected]> 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: [email protected]
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
[email protected] 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: [email protected]
***************************************************************
