Server and raid setup - Page 2

Burble · 17-09-2007, 10:40

Quote:

Originally Posted by Mark

I don't personally trust RAID-10 after seeing two hardware controllers (both 3ware IIRC) each nuke their respective arrays from orbit.

So use better controllers then. It seems a bit irrational to distrust a RAID level because of shoddy controllers.

Mark · 17-09-2007, 10:43

Aye - I won't be using 3ware again. I thought about doing RAID-10 on the controller I have at home (very reliable, touch wood), but decided against. Like I said, it's a bad vibe gained from two catastrophic failures in a short space of time. RAID-10 wouldn't exist if it wasn't reliable.

Daz · 17-09-2007, 10:53

Heh, tell that to RAID-3 & 4 & 6

If it's good enough for banks and large enterprises, then it's good enough for me

It helps to understand these things, but when it comes down to it, you rely on what's tried and tested.

Zirax · 17-09-2007, 11:06

Just been reading up on raid 10 and it does look like a good solution. However I gather that when a read instruction is sent through, it will be covered by the raid 0 array? So in my example above, two drives will be used.

Daz · 17-09-2007, 11:07

Depends on the controller dude. That's how it should be handled though yes, no reason to go into the mirror pair for reading.

Zirax · 17-09-2007, 11:11

Got it. I may need to increase the capacity of my drives if doing raid 10 then. Seeing as I will end up with one array of 160gb?
2*raid 1 mirror then the raid 0 over the top is 160?

Daz · 17-09-2007, 11:12

Nay, 320. Stripe 2x160's = 320, then mirror that pair.

Burble · 17-09-2007, 11:13

Nay, 320Gb. You stripe together 2 discs and then mirror the stripe set.

Daz · 17-09-2007, 11:14

Your powers are weak old man

Burble · 17-09-2007, 11:15

Bah, serves me right for trying to work at the same time

17-09-2007, 10:53	#13
Daz The Stig Join Date: Jun 2006 Location: Swad! Posts: 10,713	Heh, tell that to RAID-3 & 4 & 6 If it's good enough for banks and large enterprises, then it's good enough for me It helps to understand these things, but when it comes down to it, you rely on what's tried and tested. __________________ apt-get moo

17-09-2007, 11:07	#15
Daz The Stig Join Date: Jun 2006 Location: Swad! Posts: 10,713	Depends on the controller dude. That's how it should be handled though yes, no reason to go into the mirror pair for reading. __________________ apt-get moo

17-09-2007, 11:12	#17
Daz The Stig Join Date: Jun 2006 Location: Swad! Posts: 10,713	Nay, 320. Stripe 2x160's = 320, then mirror that pair. __________________ apt-get moo

17-09-2007, 11:14	#19
Daz The Stig Join Date: Jun 2006 Location: Swad! Posts: 10,713	Your powers are weak old man __________________ apt-get moo

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17-09-2007, 10:43	#12
Mark Screaming Orgasm Join Date: Jul 2006 Location: Newbury Posts: 15,194	Aye - I won't be using 3ware again. I thought about doing RAID-10 on the controller I have at home (very reliable, touch wood), but decided against. Like I said, it's a bad vibe gained from two catastrophic failures in a short space of time. RAID-10 wouldn't exist if it wasn't reliable.

17-09-2007, 11:06	#14
Zirax Goes up to 11! Join Date: Jul 2006 Posts: 4,577	Just been reading up on raid 10 and it does look like a good solution. However I gather that when a read instruction is sent through, it will be covered by the raid 0 array? So in my example above, two drives will be used.

17-09-2007, 11:11	#16
Zirax Goes up to 11! Join Date: Jul 2006 Posts: 4,577	Got it. I may need to increase the capacity of my drives if doing raid 10 then. Seeing as I will end up with one array of 160gb? 2*raid 1 mirror then the raid 0 over the top is 160?

17-09-2007, 11:13	#18
Burble Rocket Fuel Join Date: Jul 2006 Posts: 7,826	Nay, 320Gb. You stripe together 2 discs and then mirror the stripe set.

17-09-2007, 11:15	#20
Burble Rocket Fuel Join Date: Jul 2006 Posts: 7,826	Bah, serves me right for trying to work at the same time