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PERC 5/i RAID Card: Tips and Benchmarks - Page 445

post #4441 of 7276
Quote:
Originally Posted by jeffk95z View Post
son of a b!tch

i go in and change the bios to have cd-rom as first boot, then hard drive... and the damn thing boots to the array!!

this is the type of activity i've experienced before... very frustrating!
I would try the firmware upgrade and see if it makes things more predictable...
    
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post #4442 of 7276
should there be any problems using perc on this itx mobo?
http://www.zotacusa.com/zotac-ionitx...therboard.html

it's going to end up as a NAS+HTPC thing

also,
you have a really good point, a lot of 2T hdds also means a lot of risk in raid 5
raid 6 is the solution but it's dame expensive to use 2 hdd for party (in israel 2T = 680nis =~ 175$)

i was thinking about trying unRAID
1. no raid card needed
2. if 2 hdds fail, only the data on the dead hdd is gone (still 2T but...)

another thing,
can the perc work with the new WD20EARS hdds that uses 4kB sectors instead of the normal 512B sectors
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post #4443 of 7276
Ive seen people use the WD20EARS but said there was a performance hit and did not recommend them. However, if you can find them cheap I am sure it would be worth the tradeoff.

unRAID somewhat defeats the purpose of RAID, and you will lose the performance benefits of RAID5/6

One other thing you could do is spend the money you would have spent on a 6/i upgrade on another 2TB drive and use it on the 5/i as a hot spare. That way you can just replace the spare without needing to run degraded. It isn't as robust and error-proof as RAID6, by any means. You still have to rebuild the array if you lose a drive, so if you lose 2 drives or encounter a URE you are dead in the water. But it is more cost effective if you don't have to upgrade your current RAID card, and if you were planning on moving to RAID6 you would have lost that disk to parity anyway. Hot spare is like the poor man's RAID6
Edited by DJZeratul - 7/9/10 at 9:01am
    
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post #4444 of 7276
as far as i could get it, unRAID is a ****ed up version of raid 4 that has a 1 drive fail tolerance
the main hit is speed
the advantage is that multi fail is not a total loss of the data
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post #4445 of 7276
Im looking to get a perc 6i. Does the following perc6i part#YW946 support raid5 or 6? thanks
post #4446 of 7276
Quote:
Originally Posted by starmanone View Post
Im looking to get a perc 6i. Does the following perc6i part#YW946 support raid5 or 6? thanks
Yes, the 6/i supports both levels: RAID 5 and RAID 6

Make sure its a 6/i and not a SAS 6/iR, which does not have hardware RAID5/6 support.

YW946 is the part number for the 6/i card you want, but some sellers on eBay list this erroneously. Beware of bad listings.
Edited by DJZeratul - 7/9/10 at 9:08am
    
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post #4447 of 7276
Quote:
Originally Posted by iakovl View Post
also,
you have a really good point, a lot of 2T hdds also means a lot of risk in raid 5
raid 6 is the solution but it's dame expensive to use 2 hdd for party (in israel 2T = 680nis =~ 175$)

i was thinking about trying unRAID
1. no raid card needed
2. if 2 hdds fail, only the data on the dead hdd is gone (still 2T but...)

another thing,
can the perc work with the new WD20EARS hdds that uses 4kB sectors instead of the normal 512B sectors
Sure it's more expensive than using 1 disk, but it is a LOT more robust. How important is your data, and do you have a full backup of everything?

Also remember that the prices of the PERC 5 and PERC 6 cards is pretty similar second hand, even though the 6s are much more capable, so you can recoup much of the upgrade cost when you sell your 5/i.

I have only heard of people having problems with 4K sector drives on every hardware RAID card I know to have been extensively tested (even with the 512b jumpers in place). I wouldn't use them with cards as old as the PERCs - the new H-series cards may be better, but as yet I believe the firmware update to allow non-Dell disks has not been released so they aren't really an option.
post #4448 of 7276
As far as i know perc5 has no temperature sensor.

I'm now trying to find a simple solution to monitor the temperature of the raidcontroller with a external sensor or something and read it with a simple piece of software.

I'm not looking for the fancy blue led Fan/Temperature controllers that are on the market but just a sensor which i can connect to usb or rs232 and readout the temperature.

It sounds simple but i can't find something like this...
post #4449 of 7276
Quote:
Originally Posted by the_beast View Post
How important is your data, and do you have a full backup of everything?
very
i back up my extra important data on external 500G

Quote:
Originally Posted by joriz View Post
It sounds simple but i can't find something like this...
usb isn't simple
use this (i use it)
http://www.performance-pcs.com/catal...ducts_id=27868
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post #4450 of 7276
The ability to use 3rd party drives will be enabled on the PERC H700 and H800 by Q2FY11. Hopefully someone can try these out after the firmware update: http://www.standalone-sysadmin.com/b...-party-drives/
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