From: Alexei_Roudnev (Alexei_Roudnev_at_exigengroup.com)
Date: Wed Nov 21 2007 - 20:13:17 CET
Message-ID: <061a01c82c72$92522510$7031a8c0@exigengroup.com> From: "Alexei_Roudnev" <Alexei_Roudnev@exigengroup.com> Date: Wed, 21 Nov 2007 11:13:17 -0800 Subject: Re: [suse-sles-e] Re: What is up with >2TB luns?
I can't image any case, when I need > 2 TB device for the boot file system.
If it is local disk - disks are smaller then 2 TB. If it is LUN from SAN
storage - you can always partition storage in SAN system
and allocate 1 smaller LUN for OS and 1 bigger LUN for other purposes.
So, OS boot should not be a case; partitioning of the 2 TB LUN-s can be
worked around by LVM and EVMS, BUT LVM or EVMS MUST work with LUN-s > 2 GB.
SLES9 yast2 does not support LVM over the unp[artitioned disk, btw, which
create some (minor, fortunately) problems.
PS. I recommend do not create LUN's > 2 TB at all. Create a few smaller
LUN's, and use LVM or EVMS to create a big volunes (but if it does not work,
it is a serious concern! )
Normal case is:
Lun0 - 30 GB, for the system
Lun10, Lun11, ...:un19 - each 1 TB size, for the data.
Grouped into the volume group
Used to allocate logical volumes.
It allows easy adding disk space on-line (just add new LUN and resize
logilca volume online).
----- Original Message -----
From: "Joe Georger" <jgeorger@ll.mit.edu>
To: <suse-sles-e@suse.com>
Sent: Wednesday, November 21, 2007 6:10 AM
Subject: Re: [suse-sles-e] Re: What is up with >2TB luns?
> If the *device* he wants to boot from is > 2 TB you cannot use a dos
> partition label to create a smaller root partition. If you want to
> partition a > 2 TB device you have to use GPT labels, which appear to be
> problematic to boot from.
>
> Joe
>
> Anton Dischner wrote:
>> Hi Ron.
>>
>> i have a deja vue here.
>>
>> Same problems in 1992 with IBM AIX.
>> There was a fabulous volume manager but you could
>> not handle filesystems or files > 2 GB.
>>
>> I hope people like Novell will recognize that we will need
>> even files > 2 TB very soon.
>>
>> And in 2022 we will have same discussion with filsystems and files > 2 PB
>>
>> To be serious: Having your boot partition < 2 TB and data > 2 TB makes
>> perfect sense.
>>
>> We do it like this even if we don't have to. And I am a great fan of
>> "no partitioning without need"
>>
>> kind regards,
>>
>> Toni
>>
>> PS: Yes i know there are filesystems with no practical limit for long
>> times
>>
>>> Novell is not supporting this as I would expect, and telling me if I
>>> want >2TB
>>> disks, then I need to change my architecture to IA64.
>>>
>>> I do not find this acceptable, any one else have comments, or
>>> suggestions?
>>>
>>> Ron
>>>
>>
>> --+-----------------------------------------------------------------+
>> | Anton Dischner, Unix admin, Oracle-DBA Phone: +49 89 70953202|
>> | Institut fuer Klinische Chemie Fax : +49 89 70958888|
>> | Klinikum Grosshadern Home : +49 89 69708766|
>> | Ludwig Maximilians Universitaet Muenchen Mobil: +49 172 8388880|
>> | 81366 Muenchen Germany |
>> | Marchioninistr. 15 Anton.Dischner"at"med.uni-muenchen.de |
>> +-----------------------------------------------------------------+
>>
>>
>
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