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Setting stripe size

M

mayakindaguy

Gawd
Joined
Jan 28, 2004
Messages
538
Does anyone know where to set the stripe size for RAID 0. Can't seem to get to it in my RAID BIOS when u ctrl+F. Also wondering if anyone can account for performance with different stripe sizes. I read somewhere 32 and 64 were best. One for gaming and office tasks while the other was better for redundant reads (I think, don't remember which is which) however, I did read on Storageguide or was it PCguide that 128 was found to be the optimal setting for balanced use and 4 made certain taks whiz but general computing suck.
 
I'm guessing that's a promise bios given the keystroke to get in, and if so, you set the stripe size upon array creation. Once created you're stuck with it until you obliterate the array and start over. Optimal stripe size depends on your access patterns. Smaller for more random searches and typical desktop use, larger for media access/editing. Figure out what you're going to be doing, then find the right stripe size for it.
 
awww, i don't remember having the option when setting it up. argh, maybe 64 will do. Thanks for the info.
 
No...the stripe size is the amount of data that gets written to each drive in the array. The cluster size is the minimum amount of data the operating system uses at a time. With a RAID array, that ratio between cluster size and stripe size has a lot to do with how fast the array is...also the size of the cache in the hard drive.
 
Well I haven´t seen that option. Where do I change it and what is optimum generally for windows XP and games and such?

cluster size of 32 kbit should be optimum I think but stripe size?
 
Cluster size is also one of those things with variable optimality. Windows defaults to 4KB clusters with NTFS, go any larger and the built-in defragger refuses to work. However, from a disk usage standpoint, 16KB clusters are about what you'd want to shoot for, as larger cluster sizes lower filesystem overhead but increase wastage when a file doesn't fill the entire cluster. 32KB and above are again things you'd want to use either on really large drives or with lots of contiguous files. Many databases are also optimized for 32KB cluster sizes and above. To set or reset cluster size you have to reformat a given partition.
 
Okay so what stripe size would you recommend? storage area isn´t an issue so I guess I would go for 32 instead of 16?

Everytime I think I know all I need about SATA and RAID there is something new to consider.
 
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