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PERC 5/i RAID Card: Tips and Benchmarks - Page 304

post #3031 of 7150
Quote:
Originally Posted by supermiguel View Post
speed wise, will the speed of a raid 5 using the perc, be the same as using raid 0 using linux software raid?
(kinda answering the same question in 2 threads here, but hey...)

If the number of drives is the same, RAID0 will always beat a RAID5 (at least for lower numbers of disks - I have heard that RAID5 can scale better than RAID0, but this is more to do with controllers optimised for large RAID5 arrays than the underlying technology, and is hard to predict).

If you assume the controllers don't limit you (which is actually a reasonable assumption for most decent hardware RAID cards & Linux Software RAID0, at least as far as personal use goes), then RAID5 needs 1 more disk than RAID0 to offer the same performance.

The amount of cpu overhead involved in RAID0 is so small that onboard & software solutions can be considered just as fast as dedicated cards (especially if caching is enabled on all the systems). Decent software RAID5 has a slight performance hit on writes, but if the cost of the controller is instead put towards faster disks or a better cpu this can be offset. Large software RAID5 arrays can often be read much faster than hardware RAID5 arrays, as multiple controllers can be used which removes a potential bottleneck.
post #3032 of 7150
Quote:
Originally Posted by iakovl View Post
can you use the perc 5/i with FreeNas? if so, how to do it?
FreeNas?
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Lee XT
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post #3033 of 7150
Quote:
Originally Posted by Licht View Post
FreeNas?
FreeNAS is a free network-attached storage server, supporting: CIFS (Samba), FTP, NFS, rsync, AFP protocols, iSCSI, S.M.A.R.T., local user authentication, and software RAID (0,1,5), with a web-based configuration interface. FreeNAS takes less than 64 MB once installed on CompactFlash, hard drive or USB flash drive.[1] FreeNAS is currently distributed as an ISO image and in source form. It is possible to run FreeNAS from a Live CD, with the configuration files stored on an MS-DOS-formatted floppy disk. There is also a VMware disk image available.

]
Edited by supermiguel - 8/11/09 at 6:35am
post #3034 of 7150
Quote:
Originally Posted by iakovl View Post
can you use the perc 5/i with FreeNas? if so, how to do it?
Yes you can.
FreeNAS works perfect with PERC 5/i.

I used this:


*Edit image*
Edited by Burken - 8/11/09 at 4:12pm
post #3035 of 7150
the img link is broken but from the name i think about CF to IDE, i was thinking about using usb DOK.

the main point of my question is that i intend to move my perc from my main pc into a file server/NAS when i'll add another 4*1T drives (too many for my main pc)
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post #3036 of 7150
Quote:
Originally Posted by Dj.R View Post
hi,
i have perc5i with 4 drives in raid5 and 3 virtual drive .
i bought one more drive to expand the raid .
i added the drive to the perc5i and i see the drive in physical drive but i have not option to add this drive in "MegaRAID Storage Manager"
what the problem ? why i can not add the drive to my raid5 ?
http://i32.tinypic.com/omg7t.jpg
http://i32.tinypic.com/nqa3ap.jpg
somebody ?
post #3037 of 7150
Quote:
Originally Posted by the_beast View Post
Hate to be the bearer of bad news, but if you only want to use the PERC with your 2 SSDs in RAID0, you would probably be better using the onboard ICH10R controller. It will be just as fast, and would have saved you $100.

The PERC5 is really best suited to those with crappy NVidia RAID controllers (which are poor read performers) or for those wanting to run a RAID5 storage array.

EDIT: actually, which model of SSD do you have? If they are the old, non-cached (JMicron controller) versions, the PERC will (should) remove the stuttering issue. So if this is the case, it will be worthwhile...
they are older SSD's 30gb OCZ drives. I got thedrives and the card in a trade for a 4890 that I could live with out. I wanted to try some SSD's and see if it is worth the cash to go with higher volume of storage.

I hope it works out.
    
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post #3038 of 7150
i have this Mobo http://www.newegg.com/Product/Produc...82E16813138130 will a PERC 5/i work on it?
post #3039 of 7150
Is there some sort of compatibility list somewhere? Will a 5e work?
Benefits of using a 6i vs a 5i. Anybody know which core i7 compatible motherboards this will work on?
post #3040 of 7150
I'm using a Perc 5i on Windows Server 2008. Performance is good and updated dell drivers installed fine.

I am however really struggling to get either the Dell or LSI mangement software to install.

I've found and tried LSI 2.90-01 and 2.35-01 and Dell A06 R194183.

Regardless of the version the installer fails with the following message:


"The wizard was interrupted before MegaRAID Storage Manager v2.90-01 could be completely installed.

Your system has not been modified. To complete instalation at another time please run setup again.

Click Finish to exit the wizard"

This seems an issue with the installer/the way the install is packaged and it not liking Server 2008 - does anyone know of a version that will install, or of a workaround?

Regards,

Peter.
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