mdoom Posted October 5, 2014 Share Posted October 5, 2014 http://smile.amazon.com/Western-Digital-3-5-inch-IntelliPower-WD60EFRX/dp/B00LO3KR96/ref=sr_1_5?ie=UTF8&qid=1412510195&sr=8-5 I think WD Red's in 6TB are fairly new. I haven't heard yet of anyone using them in unraid to see how they go, but being Red drives, seems to be a decent option compared to other 6 TB drives out there in this price range Quote Link to comment
garycase Posted October 5, 2014 Share Posted October 5, 2014 http://smile.amazon.com/Western-Digital-3-5-inch-IntelliPower-WD60EFRX/dp/B00LO3KR96/ref=sr_1_5?ie=UTF8&qid=1412510195&sr=8-5 I think WD Red's in 6TB are fairly new. I haven't heard yet of anyone using them in unraid to see how they go, but being Red drives, seems to be a decent option compared to other 6 TB drives out there in this price range There are several folks on this forum who are using them -- they seem fine, although clearly it's early in their life, so there's not a huge amount of feedback yet. The only potential issue is whether the new 1.25TB platters have any issues due to the increased density -- but I haven't seen any reported; and the higher density means they have notably better performance than their smaller cousins. Quote Link to comment
interwebtech Posted October 5, 2014 Share Posted October 5, 2014 newegg has it $10 cheaper with code: EMCWPPH33, ends 10/8 http://www.newegg.com/Product/Product.aspx?Item=N82E16822236737 Quote Link to comment
prostuff1 Posted October 6, 2014 Share Posted October 6, 2014 I have ordered about 20 of these drives in the last month. Some of them where tested with preclear for 3 passes and they all passed fine. Some did not get tested but I have not heard anything negative so I assume they are working fine. Quote Link to comment
mdoom Posted October 6, 2014 Author Share Posted October 6, 2014 I have ordered about 20 of these drives in the last month. Some of them where tested with preclear for 3 passes and they all passed fine. Some did not get tested but I have not heard anything negative so I assume they are working fine. This is great to hear! It may finally be time to upgrade from my array of 3 TB drives. Quote Link to comment
switchman Posted October 6, 2014 Share Posted October 6, 2014 I have one in the first preclear cycle now. I plan on running a total of five. If it is going to fail, I want it to fail now. I want to make sure it is good as it will be my new parity drive. The first unit I received had issues. It made a weird noise, not a grinding noise but another weird noise that is hard to describe. When it was attached to my Supermicro controller, it would not let the server boot. Connected to the Syba controller, it would boot but would throw all kinds of errors for the drive. Returned it to New Egg and they shipped me a new one. Quote Link to comment
interwebtech Posted October 6, 2014 Share Posted October 6, 2014 Mine should ship today It will be my new parity replacing 5TB Toshiba I wish I had not bought so early. lol Quote Link to comment
ogi Posted October 8, 2014 Share Posted October 8, 2014 I have ordered about 20 of these drives in the last month. Some of them where tested with preclear for 3 passes and they all passed fine. Some did not get tested but I have not heard anything negative so I assume they are working fine. mother of god, how long did it take to pre-clear one of these guys? Quote Link to comment
Brucey7 Posted October 9, 2014 Share Posted October 9, 2014 Preclear should finish some time next year Quote Link to comment
switchman Posted October 9, 2014 Share Posted October 9, 2014 == invoked as: ./preclear_disk.sh -c 1 -w 32768 -r 32768 -b 1000 /dev/sdi == WDCWD60EFRX-68MYMN1 WD-WX11D4417439 == Disk /dev/sdi has been successfully precleared == with a starting sector of 1 == Ran 1 cycle == == Using :Read block size = 32768 Bytes == Last Cycle's Pre Read Time : 21:48:25 (76 MB/s) == Last Cycle's Zeroing time : 12:50:45 (129 MB/s) == Last Cycle's Post Read Time : 37:06:20 (44 MB/s) == Last Cycle's Total Time : 71:46:30 == == Total Elapsed Time 71:46:30 Quote Link to comment
archedraft Posted October 9, 2014 Share Posted October 9, 2014 So I'm guessing you are going to be looking at 24hr+ long parity checks? Quote Link to comment
prostuff1 Posted October 9, 2014 Share Posted October 9, 2014 I have ordered about 20 of these drives in the last month. Some of them where tested with preclear for 3 passes and they all passed fine. Some did not get tested but I have not heard anything negative so I assume they are working fine. mother of god, how long did it take to pre-clear one of these guys? For Ever Only thing that saved me was the fact that I have a test server that can preclear 6 drives at once. I also have an HP microserver that can be pressed into preclear service if need be. Quote Link to comment
prostuff1 Posted October 9, 2014 Share Posted October 9, 2014 Preclear should finish some time next year Sounds about right Quote Link to comment
prostuff1 Posted October 9, 2014 Share Posted October 9, 2014 So I'm guessing you are going to be looking at 24hr+ long parity checks? No, it was not that long. preclears take longer because of the read/write/read that is does. If I remember correctly it was some where between 10-12 hours for a parity check. Quote Link to comment
archedraft Posted October 9, 2014 Share Posted October 9, 2014 Really? My parity drive is 3TB and takes 10 hrs to finish... Quote Link to comment
bkastner Posted October 9, 2014 Share Posted October 9, 2014 So I'm guessing you are going to be looking at 24hr+ long parity checks? No, it was not that long. preclears take longer because of the read/write/read that is does. If I remember correctly it was some where between 10-12 hours for a parity check. I completed a parity check with a WD 6TB Red drive as parity yesterday: Last checked on Wed 08 Oct 2014 04:54:44 AM EDT (yesterday), finding 0 errors. > Duration: 17 hours, 29 minutes, 49 seconds. Average speed: 95.3 MB/sec As for the preclear I had set it for 3 cycles, but gave up after 2 completed as it had already been days... Does anyone know what ever happened to bjp999's modification to the preclear process that helped reduce time? I had helped beta test with him, and it definitely shaved time off. Given how long 6TB disks are taking, and with 8TB and 10TB in the not too distant future it may be worth trying to update the preclear script. Quote Link to comment
garycase Posted October 9, 2014 Share Posted October 9, 2014 I completed a parity check with a WD 6TB Red drive as parity yesterday: Last checked on Wed 08 Oct 2014 04:54:44 AM EDT (yesterday), finding 0 errors. > Duration: 17 hours, 29 minutes, 49 seconds. Average speed: 95.3 MB/sec That's actually slower than I'd expect. I assume this system has other drives as well -- correct? That would explain the speed; as in that case the 6TB drive's speed is irrelevant, since the max speed at any given point in the testing is limited by the slowest drive still involved in the test (so only the last 2TB are at the speed of the 6TB unit; and by that time it's approaching the slower inner cylinders). As for the preclear I had set it for 3 cycles, but gave up after 2 completed as it had already been days... Does anyone know what ever happened to bjp999's modification to the preclear process that helped reduce time? I had helped beta test with him, and it definitely shaved time off. Given how long 6TB disks are taking, and with 8TB and 10TB in the not too distant future it may be worth trying to update the preclear script. Not sure if Brian ever completed that or not. It was nice to have a bit of a speedup, but the reality is it still takes a long time .. and when something takes days to run, it doesn't seem all that big a deal just how many days it is. I do a bit of a different process to "qualify" my new drives, and it's a bit quicker than multiple pre-clear passes. I run WD's Data Lifeguard on the drive (attached to a Windows box) and do the Quick test, then the Extended test, then write zeroes to the entire drive, then repeat both the quick and extended tests. ANY errors and the drive goes back. If it passes, then I put it in the UnRAID box (actually a spare system I use for pre-clears), and do a single pre-clear pass. Drives that pass that regimen have been exceptionally reliable (I have RMA'd a few that didn't pass this set of tests). Quote Link to comment
bkastner Posted October 9, 2014 Share Posted October 9, 2014 I completed a parity check with a WD 6TB Red drive as parity yesterday: Last checked on Wed 08 Oct 2014 04:54:44 AM EDT (yesterday), finding 0 errors. > Duration: 17 hours, 29 minutes, 49 seconds. Average speed: 95.3 MB/sec That's actually slower than I'd expect. I assume this system has other drives as well -- correct? That would explain the speed; as in that case the 6TB drive's speed is irrelevant, since the max speed at any given point in the testing is limited by the slowest drive still involved in the test (so only the last 2TB are at the speed of the 6TB unit; and by that time it's approaching the slower inner cylinders). There are a couple of 4TB WD Reds, and a mix of 3TB/4TB WD Greens in the system. As for the preclear I had set it for 3 cycles, but gave up after 2 completed as it had already been days... Does anyone know what ever happened to bjp999's modification to the preclear process that helped reduce time? I had helped beta test with him, and it definitely shaved time off. Given how long 6TB disks are taking, and with 8TB and 10TB in the not too distant future it may be worth trying to update the preclear script. Not sure if Brian ever completed that or not. It was nice to have a bit of a speedup, but the reality is it still takes a long time .. and when something takes days to run, it doesn't seem all that big a deal just how many days it is. I do a bit of a different process to "qualify" my new drives, and it's a bit quicker than multiple pre-clear passes. I run WD's Data Lifeguard on the drive (attached to a Windows box) and do the Quick test, then the Extended test, then write zeroes to the entire drive, then repeat both the quick and extended tests. ANY errors and the drive goes back. If it passes, then I put it in the UnRAID box (actually a spare system I use for pre-clears), and do a single pre-clear pass. Drives that pass that regimen have been exceptionally reliable (I have RMA'd a few that didn't pass this set of tests). I think Brian left it up to Joe_L if I remember correctly (as I think Joe_L was the author of the original script, right?). I am not sure if anything happened beyond that. While I do sort of agree with your belief, if it's basically 3 days for a single pass on a 6TB drive, you can extrapolate to 4 days for 8TB and 5 days for 10TB. When doing 3 passes you could be looking at 15 days for a 10TB drive - if you are an unfortunate soul who has a defective drive and don't have a pre-cleared spare ready to go, the two weeks of exposure is going to be very disconcerting. Anything that can be done to reduce that would be helpful for all of us. Personally I may switch to your process since I only buy WD drives, so it's only a single toolset I need to rely on. Quote Link to comment
garycase Posted October 9, 2014 Share Posted October 9, 2014 Really? My parity drive is 3TB and takes 10 hrs to finish... I suspect your system has other (slower) drives in it. A parity check is always limited by the slowest drive currently involved in the check ... and if you have multiple sizes, it's also slowing down appreciably as each drive reaches the slower inner cylinders. The only real test of how fast a particular drive is for parity checks is to do a check on a system with ONLY that specific drive model in it. Quote Link to comment
prostuff1 Posted October 9, 2014 Share Posted October 9, 2014 Really? My parity drive is 3TB and takes 10 hrs to finish... Yup. I had started a check with 10 6TB drives at about 6:30am. When i got home from work at 4:30 is said there was 2-3 hours or so left. So a little over 12 hours for a parity check. Quote Link to comment
prostuff1 Posted October 9, 2014 Share Posted October 9, 2014 Really? My parity drive is 3TB and takes 10 hrs to finish... I suspect your system has other (slower) drives in it. A parity check is always limited by the slowest drive currently involved in the check ... and if you have multiple sizes, it's also slowing down appreciably as each drive reaches the slower inner cylinders. The only real test of how fast a particular drive is for parity checks is to do a check on a system with ONLY that specific drive model in it. Yup, and this system has 10 of the 6TB Red drives in it. They are quick that is for sure. I was seeing speeds in the 155 MB/sec range when starting out the check. I don't remember ever seeing it dip below 105 MB/sec Quote Link to comment
garycase Posted October 9, 2014 Share Posted October 9, 2014 When doing 3 passes you could be looking at 15 days for a 10TB drive - if you are an unfortunate soul who has a defective drive and don't have a pre-cleared spare ready to go, the two weeks of exposure is going to be very disconcerting. Anything that can be done to reduce that would be helpful for all of us. Agree -- "Anything that can be done to reduce that would be helpful for all of us." ==> and there's a very simple thing that anyone can do to not only reduce, but completely eliminate that time: Keep a pre-cleared spare ... of course by far the best way to reduce the discomfort of a system that's running at risk is to be sure you have good backups. Quote Link to comment
bkastner Posted October 9, 2014 Share Posted October 9, 2014 When doing 3 passes you could be looking at 15 days for a 10TB drive - if you are an unfortunate soul who has a defective drive and don't have a pre-cleared spare ready to go, the two weeks of exposure is going to be very disconcerting. Anything that can be done to reduce that would be helpful for all of us. Agree -- "Anything that can be done to reduce that would be helpful for all of us." ==> and there's a very simple thing that anyone can do to not only reduce, but completely eliminate that time: Keep a pre-cleared spare Always a good idea, but not always feasible. ... of course by far the best way to reduce the discomfort of a system that's running at risk is to be sure you have good backups. Boy... it's like 6 degrees of separation with you isn't it? No matter the conversation start point it can always be brought back to good backups. Quote Link to comment
tr0910 Posted October 10, 2014 Share Posted October 10, 2014 Grin, Gary has a stump speech. I have to agree with him on this topic though. Quote Link to comment
bkastner Posted October 10, 2014 Share Posted October 10, 2014 Grin, Gary has a stump speech. I have to agree with him on this topic though. I don't disagree with him either, but it's always amusing. "How's the weather Gary?" "Looks okay, but would be better with a backup!" Quote Link to comment
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