Raid 0 stripe size


 
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Operating Systems Linux Raid 0 stripe size
# 1  
Old 08-24-2009
Raid 0 stripe size

I have a PERC 5/i card. Im using with it 3 15k rpm HDD's (model: SEAGATE Savvio 15K ST936751SS). Im going to install debian on this array.. and im looking for performance... So what would be the stripe size that i should set this raid 0 into to give me the best performance?

Thanks
# 2  
Old 08-25-2009
In short: don't. RAID 0 gives you no redundancy or fault tolerance. Go with RAID 5 (or maybe RAID 1).

As for the stripe size: Dell suggests 128KB stripes.
# 3  
Old 08-25-2009
I agree with pludi,
Better go for Raid 1 or Raid 5 ( for more usable space)
# 4  
Old 08-25-2009
i do my backups on a raid 5 (3x500gb)... So this perc 5 card, has 3x 36g (15K) hds in raid 0, and a raid 5 of 3x500gb, where my data is going to go. So?? best stripe for raid 0? 128k?

---------- Post updated at 09:47 AM ---------- Previous update was at 07:39 AM ----------

any one?
# 5  
Old 08-25-2009
Quote:
Originally Posted by supermiguel
what would be the stripe size that i should set this raid 0 into to give me the best performance?
What is the nature of your I/O? Predominantly random? Sequential? If you think it's a mix, then go 64K stripe size to split the difference.
# 6  
Old 08-25-2009
Quote:
Originally Posted by Radar
What is the nature of your I/O? Predominantly random? Sequential? If you think it's a mix, then go 64K stripe size to split the difference.
mostly i do a bit of programing, web browsing and word preocessing.. So i guess that would be sequential?
# 7  
Old 08-25-2009
Highly random. Mix read and write. 64K or smaller I would say.
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