logs on RAID 0


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logs on RAID 0

Postby Y2hpbGRvZnRoZTE5ODBz » Mon, 01 Oct 2007 00:13:02 GMT


Is it OK to have ldf files on a RAID 0 drive?


Re: logs on RAID 0

Postby ?Utf-8?Q?Ekrem_C396nsoy » Mon, 01 Oct 2007 02:01:56 GMT

It depends. If you are looking for only performence but not redundancy for 
your t-log then go with the RAID0.

If you are looking for performance and redundancy for your t-log then I 
suggest you to use RAID1 for your t-log.

Ekrem nsoy

"childofthe1980s" < XXXX@XXXXX.COM > wrote in 

Re: logs on RAID 0

Postby Tibor Karaszi » Mon, 01 Oct 2007 02:34:56 GMT

Just to add a little bit to Ekrem's comments.

If there's anything where you want redundancy, then it is the log files. If you lose the mdf file, 
you still backup the log, and have zero data loss. If you lose the log file, well, you can't do a 
backup of the log...

Of course, above assumes full recovery model and that zero data loss is something you aim for.

Tibor Karaszi, SQL Server MVP

Re: logs on RAID 0

Postby Andrew J. Kelly » Tue, 02 Oct 2007 05:00:04 GMT

Is it OK to loose data?

Andrew J. Kelly    SQL MVP
Solid Quality Mentors

"childofthe1980s" < XXXX@XXXXX.COM > wrote in 

Re: logs on RAID 0

Postby Y2hpbGRvZnRoZTE5ODBz » Tue, 02 Oct 2007 09:17:08 GMT

Sarcasm is extremely unprofessional.  And, it's the worst form of "mentoring" 
that there is.

This posting is supposed to be a friendly place where people can I ask 
questions and discuss ideas.  

This is the second time on this newsgroup that a "professional" has been 
rude when I ask a question.

If any Newsgroup admins review these postings, please take action.


Re: logs on RAID 0

Postby Andrew J. Kelly » Tue, 02 Oct 2007 11:00:40 GMT

That wasn't sarcasm, it was a valid question. You provided no information 
what so ever, you just posed a question to which it is impossible to answer 
correctly without more information. There are plenty of systems that don't 
require the stability logs provide. For instance a DataMart that gets 
rebuilt each night. As a matter of fact many DW type systems use Raid 0 for 
the speed of writes and the fact that less disks are required. Maybe before 
you jump to conclusions you should consider providing more detail so people 
can give more directed answers without assumptions.

Andrew J. Kelly    SQL MVP
Solid Quality Mentors

"childofthe1980s" < XXXX@XXXXX.COM > wrote in 

Re: logs on RAID 0

Postby Hank Arnold (MVP) » Tue, 16 Oct 2007 18:24:50 GMT

It's no OK to have, IMHO, *ANYTHING* on a RAID 0 array. I'm sure that 
there are some who feel it's OK in certain situations, but certainly not 

The problem is that if either drive fails, YOU LOSE *EVERYTHING*!! It 
would be a major disaster if you lose the ldf files for a database. Put 
them on a RAID 1 array and sleep at night....


Hank Arnold
Microsoft MVP
Windows Server - Directory Services

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