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PERC 5/i RAID Card: Tips and Benchmarks - Page 642

post #6411 of 7276
Quote:
Originally Posted by ahriman View Post

Want to get this thread's opinion/stamp of approval on this HDD (WD1003FBYX) for a RAID5 or 6 in a PE2950: http://www.newegg.com/Product/Product.aspx?Item=N82E16822136798. Also, opinions on RAID 5 vs RAID 6 with 6 drives?

I would get the 2tb WD red drives they are the same price and are made for raid arrays. Ive got 4 in raid 5 right now
http://www.newegg.com/Product/Product.aspx?Item=N82E16822236343
post #6412 of 7276
Quote:
Originally Posted by kyle5281 View Post

RAID 6 is Double Parity, so you can sustain 2 HDD failures before data loss. I would highly recommend if you can afford the space premium. The spindles you add to an array, the bigger the chance for data loss or worse an URE during a rebuild, which will turn your array into toast. There is a slight IOPs penalty, but honestly you shouldn't notice it during normal home use.

All (well, most) of these considerations went into the choice of HDD I made (I bought 6). The URE is 10^15 to mitigate the chances of a drive failing during rebuild. I chose 1TB because the chance of URE increases as size increases, and I think I am leaning toward RAID 5 because the 20% loss of volume space would have an impact. I do understand, and at least at a high level agree with, the reasoning behind two stripes, but all things considered think RAID 5 is best for satisfying most requirements. I plan a good backup schedule which renders most problems moot.

Quote:
Originally Posted by racer86 View Post

I would get the 2tb WD red drives they are the same price and are made for raid arrays. Ive got 4 in raid 5 right now
http://www.newegg.com/Product/Product.aspx?Item=N82E16822236343

What is URE on the Reds? TLER as well? Does "made for NAS" = "made for RAID?" I got mine for $70 apiece so actually less, but knowing about the Reds would be beneficial. Skimming through the thread they seem to be a favorite.


One thing I am concerned about, and I did not catch this until after the purchase, is that WD certifies these drives on a Perc 6/i, but I am not seeing 5/i on their cert sheet. Can I be somewhat safe in assuming they will play well with the 5/i?
post #6413 of 7276
Quote:
Originally Posted by ahriman View Post

All (well, most) of these considerations went into the choice of HDD I made (I bought 6). The URE is 10^15 to mitigate the chances of a drive failing during rebuild. I chose 1TB because the chance of URE increases as size increases, and I think I am leaning toward RAID 5 because the 20% loss of volume space would have an impact. I do understand, and at least at a high level agree with, the reasoning behind two stripes, but all things considered think RAID 5 is best for satisfying most requirements. I plan a good backup schedule which renders most problems moot.
What is URE on the Reds? TLER as well? Does "made for NAS" = "made for RAID?" I got mine for $70 apiece so actually less, but knowing about the Reds would be beneficial. Skimming through the thread they seem to be a favorite.


One thing I am concerned about, and I did not catch this until after the purchase, is that WD certifies these drives on a Perc 6/i, but I am not seeing 5/i on their cert sheet. Can I be somewhat safe in assuming they will play well with the 5/i?

Yep they will work with 5i, no problems. And I think the RED Drives are a big Gimmick. Either go RE4 or cheap out and go with the Greens, but IMO the Reds are not worth it. I have seen too many reviews of poor quality and mediocre results.
post #6414 of 7276
Quote:
Originally Posted by kyle5281 View Post

Yep they will work with 5i, no problems. And I think the RED Drives are a big Gimmick. Either go RE4 or cheap out and go with the Greens, but IMO the Reds are not worth it. I have seen too many reviews of poor quality and mediocre results.

reds are basicly green drives set up for raid

DO NOT get green drives for raid they WILL FAIL and fall out of raid (tried it my self)

the new green drives cannot have TLER enabled/changed and will constantly fall out of the raid array hence the creation of the red drives the RE4 are not worth the money unless you really want enterprise class drives
Edited by racer86 - 3/9/13 at 11:02am
post #6415 of 7276
Quote:
Originally Posted by kyle5281 View Post

Yep they will work with 5i, no problems. And I think the RED Drives are a big Gimmick. Either go RE4 or cheap out and go with the Greens, but IMO the Reds are not worth it. I have seen too many reviews of poor quality and mediocre results.

Thanx for your input, very helpful. Agreed with the RE4 sentiment, bite the bullet now for positive long-term results.

Quote:
Originally Posted by racer86 View Post

the RE4 are not worth the money unless you really want enterprise class drives

See above. I would rather spend $100 once now on quality, than $50 three times for a sub-par product. And thank you for the clarification on the Reds.
post #6416 of 7276
Quote:
Originally Posted by racer86 View Post

reds are basicly green drives set up for raid

DO NOT get green drives for raid they WILL FAIL and fall out of raid (tried it my self)

the new green drives cannot have TLER enabled/changed and will constantly fall out of the raid array hence the creation of the red drives the RE4 are not worth the money unless you really want enterprise class drives

I call BS on Green Drives. I'm running 7 of Em on my PERC 5I. 4 of Em in a RAID 5. Another 2 in RAID 1 and 1 as a HS. TLER just decreases the amount of time a HDD spends correcting an Error before remapping, so you have bigger problems (F/W Isuse / Slowly dying HDD) if you drives are constantly falling out due to errors.

So many people attribute command timeouts/communication issues to lack of on Drives due to lack of TLER/Limited Error Recovery, however most of the time they are wrong.

Firmware on the Controller/HDD not playing nice are is the number 1 reason for HDDs to fall offline due to command timeouts. (Dell Releases Constant F/W updates for Supported HDDs to address Issues as they arise.)
2 is BP/Cable issues / voltage regulation issues.
3 is bad HDD/Controller.
post #6417 of 7276
I`m planing to use Perc 5i in vmware ESXi and guest OS freebsd.
What is the best firmversion I can use?

Dell or LSI?
Edited by gordone - 3/11/13 at 5:50am
post #6418 of 7276
Quote:
Originally Posted by kyle5281 View Post

I call BS on Green Drives. I'm running 7 of Em on my PERC 5I. 4 of Em in a RAID 5. Another 2 in RAID 1 and 1 as a HS. TLER just decreases the amount of time a HDD spends correcting an Error before remapping, so you have bigger problems (F/W Isuse / Slowly dying HDD) if you drives are constantly falling out due to errors.

So many people attribute command timeouts/communication issues to lack of on Drives due to lack of TLER/Limited Error Recovery, however most of the time they are wrong.

Firmware on the Controller/HDD not playing nice are is the number 1 reason for HDDs to fall offline due to command timeouts. (Dell Releases Constant F/W updates for Supported HDDs to address Issues as they arise.)
2 is BP/Cable issues / voltage regulation issues.
3 is bad HDD/Controller.

I had 4 new ones and two different model #s the drives were fine on their own but in raid they would drop like crazy and not even initialize. TLER cant be messed with at all on the new greens. I switched over to reds and had all my problems solved it was definetly they green drives causing problems and im not a lone voice here.

maby your just lucky (or had some earlier drives from before they dropped TLER and WIDDLE3 support) but the majority consensus across the board is do not get WD green drives for raid (unless ur doing unraid or something they seem to work fine there)
post #6419 of 7276
Quote:
Originally Posted by racer86 View Post

I had 4 new ones and two different model #s the drives were fine on their own but in raid they would drop like crazy and not even initialize. TLER cant be messed with at all on the new greens. I switched over to reds and had all my problems solved it was definetly they green drives causing problems and im not a lone voice here.

maby your just lucky (or had some earlier drives from before they dropped TLER and WIDDLE3 support) but the majority consensus across the board is do not get WD green drives for raid (unless ur doing unraid or something they seem to work fine there)

I'm using 3 blues and 2 greens in raid5 on a PERC5/i right now. I do plan to replace the two greens with blues later, but so far right now, the raid array is normal, healthy, and optimal. I even did another consistency check last night and there were no errors and it passed and still optimal.

Also I've been using a raid-0 array in this Dual-socket-940-AMD machine for the past 3 years daily 24/7 that comprised of 2 blues and 2 greens and I didn't have a failure or single issue all that time, and that was on the s**tty NV-RAID onboard software-assist raid too, before I ever even had a PERC for this machine.

Edit: Just thought I would mention that I didn't really have the money to replace the greens in the RAID before... I had a long period of low income that was not fun, and they were all I had so they're what I ended up with, so I used them anyway. Now that I have some income.. I'll be swapping em out for blues later.
Edited by kithylin - 3/11/13 at 2:33pm
post #6420 of 7276
ya people seem to be completely hit and miss on the greens with raid I wish they worked for me they go on sale for $85 all the time that beats the $120 for the reds
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