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August 2005

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Subject:
From:
"Jorge Izquierdo (UAM)" <[log in to unmask]>
Reply To:
Jorge Izquierdo (UAM)
Date:
Wed, 17 Aug 2005 17:00:52 +0200
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Hi everybody, I'm new in the list so I apologize if the mail is not so
clear as it should be.

I'm having some troubles with SL4.0 trying to configure a filesystems of
5TB in my SCSI storage (Promise vtrack 15110).
When the system starts, the output messages shows that my SCSI device is
correctly detected and the information about the size of the RAID
storage created is right:

 scsi0 : Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev 1.3.11
        <Adaptec 39320A Ultra320 SCSI adapter>
        aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI-X 67-100Mhz,
512 SCBs

(scsi0:A:0): 160.000MB/s transfers (80.000MHz DT, 16bit)
  Vendor: Promise   Model: 14 Disk RAID5     Rev: V0.0
  Type:   Direct-Access                      ANSI SCSI revision: 04
scsi0:A:0:0: Tagged Queuing enabled.  Depth 4
SCSI device sda: 2532706176 2048-byte hdwr sectors (5186982 MB)
SCSI device sda: drive cache: write through
 sda: sda1 sda2
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0

(as you can see, I'm using the Adaptec 39320A HBA with the driver
aic79xx included with SL)

But the problems come when I try to configure my storage with fdisk and
then I try to create the ext3 filesystem with mke2fs. First of all,
fdisk doesn't allow me to create a unique partition with the full
capacity of my disk array, but when I select a partition size larger
than 4TB it doesn't work properly. Is this normal? It seems the 64 bits
support is not reflected at the time of partition creation.

So I decided to create 2 partitions (sda1 and sda2 as reflected in the
dmesg text) one of 4 TB and the other one with the rest. And here comes
the second problem, I create a ext3 FS on the sda partition with: mke2fs
-j -m 0 -b 4096 /dev/sda1
And when I mount my new filesystem and I test the mounted filesystems I
get the next information:
$# mount /dev/sda1 /mnt
$# df -h /mnt
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             2.0T  103M  2.0T   1% /mnt

So the size of my partition is only 2TB when I created a 4TB partition
with fdisk. Any ideas about this behaviour? Should I create my
filesystem in any other way to support larger than 2TB sizes? Is the 64
bits support broken anywhere with SL 4.0? Am I missing something?

Thanks for any help or any suggestion

Jorge


-- 
========================================================================
Jorge Izquierdo                      e-mail: [log in to unmask]
Laboratorio de Física de Altas Energías
Universidad Autonoma de Madrid.    Phone: 34 91 497 4541
Cantoblanco, 28049 Madrid, Spain.
========================================================================

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