Oops - thinking of RAID-5

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Post #296,496

by Andrew Grygus

11/27/07 7:21:50 PM

11/27/07 7:25:52 PM

Oops - thinking of RAID-5

Yes, with RAID-1 you lose half, RAID-5 you lose 1/3.

[link|http://www.aaxnet.com|AAx]

Edited by Andrew Grygus Nov. 27, 2007, 07:25:52 PM EST

I seem to remember you lose about 1/3 with RAID-1 . . .

. . rather than 1/2. I do RAID-1 all the time and I'm sure I'm not losing 1/2.

[link|http://www.aaxnet.com|AAx]

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Post #296,505

by crazy

11/27/07 10:28:05 PM

Assuming 3 disks

Yup, you lose 1 disk out of however many disks you have in the raid set. As you add disks, you gain speed because you have more spindles, and both streaming reads / writes get faster. But rewrites get dramatically slower as you add disks.

So it really depends on your usage pattern of whether more disks are better or worse for you.

Of course, there are many other variables to think about if you were really pushing for performance.

External storage recommendations for Linux? - (slugbug) - (10) - Nov. 26, 2007, 07:59:46 PM EST

eSATA is nice. - (Another Scott) - Nov. 26, 2007, 08:30:40 PM EST

Firewire good / USB bad - (crazy) - (1) - Nov. 26, 2007, 09:03:43 PM EST

Agree...firewire is better than usb2 but both work -NT - (bepatient) - Nov. 26, 2007, 11:47:26 PM EST

Thank you, everyone! - (slugbug) - (6) - Nov. 27, 2007, 01:23:32 PM EST

RAID is always a compromise. - (Another Scott) - (5) - Nov. 27, 2007, 05:07:10 PM EST

Good info... - (slugbug) - (2) - Nov. 27, 2007, 05:44:55 PM EST

Yup, RAID1 is simplest - (crazy) - (1) - Nov. 27, 2007, 07:08:27 PM EST

Probably - (slugbug) - Nov. 27, 2007, 07:16:35 PM EST

Oops - thinking of RAID-5 - (Andrew Grygus) - (1) - Nov. 27, 2007, 07:25:52 PM EST

Assuming 3 disks - (crazy) - Nov. 27, 2007, 10:28:05 PM EST

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