interwebtech

sent email to support couple days ago referencing this thread. No reply so I guess I am out of luck.

Parity-synch is done. Write speeds still at half normal. I am at a loss as to why.

New theory. I think the Toshiba 5TB (extracted from a retail external drive package), which is the Parity disk in this server, has a neutered firmware that may be interacting in a strange way with the AOC-SASLP-MV8 attached drives (mobo attached drives have normal write speed). I spotted what might be a clue with all the repeated troubleshooting reboots... the Asus M4A785-M BIOS is reporting the Toshiba as UDMA 5 and all the older WD 2TBs as UMDA 6. UDMA detection was set to auto and trying to set it manually to 6 was not possible as it was not an available option in the drop down; 5 was the highest for the Toshiba. Found the latest Asus BIOS and applied it. No change to detection of the Toshiba, write speeds still in the dumper. I had a newish WD 2TB sitting here and I have swapped it in place of the Toshiba. Parity synch in progress and fingers crossed that it is the solution. PS. mobo reports the replacement WD as UDMA 6. QUESTION: is it safe to try and do some writes to the affected disks to test speed? Is it even useful to try unless the parity synch is done (speed degraded due to that process)?

SMART for parity disk Nothing suspicious that I see. smart_tosh.txt

More information, not sure if it is relevant. This server has been full for over a year. Not much written to it for a while. During my conversion process I found two disks were set to read-only (connected to on-board sata, not the card) as they had some FS corruption. I ran "reiserfsck --check" on all the drives and --rebuild tree (if recall correctly) on those two drives. All the other drives no corruption was found. smart attached smart_disk8.txt

I have one of the 5 TB Toshiba as my parity on this box. Could that be involved?

Temp. Size Used Free 33 °C 2 TB 413 GB 1.59 TB swapped in new breakout cable. No effect. 10.9 MBs I guess I can swap in the the card from the other server and see if this one is bad. -------------------- okay that had no effect either.

In the process of converting movies to MKV on my oldest unRaid box and have started to have severe slow downs in writes to the disks both from attached USB external drives and across the network. Tested speed to the newer box and getting upwards 28 MBps (~250 Mbs) over network with simple copy paste of a 28GB mkv from W7 box to a test folder on the unRaid. The older box I am lucky to get 10 MBs either over network or from attached usb drive. I have been working through the 13 drives doing the conversions with normal speeds up until now... the slowdown cropped up yesterday with disk 8. All 2TB WD green drives, no red balls. SMART shows no errors. I tested a copy to disk 9 and same slow speed. Just tested copy to disk 1 and getting full speed. Hmmm... 1-5 are onboard sata, 6-13 on an AOC-SASLP-MV8. I updated firmware on card to .21 but no change in speed. ideas?

added a 2TB USB external drive and rebooted only to get the blinking cursor of heck. Freakin' MB decided that the new drive needed to be the boot drive. Found this post and all is well again.

SAMSUNG D3 Station 4TB USB 3.0 3.5" Desktop External Hard Drive STSHX-D401TDB Black 72 hour sale expires 11:59 8/31/14 $119.99 Save: $100.00 no idea if these are good or bad just intrigued by price http://www.newegg.com/Product/Product.aspx?Item=N82E16822152420&nm_mc=EMC-IGNEFL082914&cm_mmc=EMC-IGNEFL082914-_-EMC-082914-Index-_-ExternalHardDrives-_-22152420-L0H

shazbot! I did the same for someone else just the other day LOL Thanks.

WD Green WD40EZRX 4TB IntelliPower 64MB Cache SATA 6.0Gb/s 3.5 inch Internal Hard Drive - Bulk Bare Drive $139.99 With Promo Code: EMCYTZG686 Deals Expire at 11:59pm PT on 7/22/2014!

@newegg http://www.newegg.com/Product/Product.aspx?Item=N82E16822236626&nm_mc=EMC-IGNEFL071714&cm_mmc=EMC-IGNEFL071714-_-EMC-071714-Index-_-ExternalHardDrives-_-22236626-L0B

five year old thread... there are lots of 5-in-3 options now.

Western Digital Red NAS Hard Drive WD30EFRX 3TB IntelliPower 64MB Cache SATA 6.0Gb/s 3.5" NAS Hard Drive Extra savings w/ promo code EMCPCPG23, ends 7/4 $114.99

Seagate Desktop HDD.15 ST4000DM000 4TB 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive for $139.99 coupon code: EXLEMC23674 48 hours only, deal begins on Saturday, 06/14/2014 http://www.newegg.com/Product/Product.aspx?Item=N82E16822178338&nm_mc=EMC-EXPRESS061414&cm_mmc=EMC-EXPRESS061414-_-EMC-061414-Index-_-InternalHardDrives-_-22178338-L05A

from my post in April: Preclear Successful ... Total time 40:05:21 ... Pre-Read time 9:09:02 (151 MB/s) ... Zeroing time 8:11:57 (169 MB/s) ... Post-Read time 22:43:19 (61 MB/s) Now installed in Tower1 as new parity drive Parity-Sync in progress. Total size: 5 TB Current position: 42.5 MB (0 %) Estimated speed: 42.5 MB/sec Estimated finish: 1 day, 8 hours, 37 minutes

SAMSUNG D3 Station 4TB USB 3.0 3.5" Desktop External Hard Drive, Black 72 HOURS ONLY! **Promotion expires at 11:59PM PT on 5/31/14. $129.99 http://www.newegg.com/Product/Product.aspx?Item=N82E16822152420&cm_re=STSHX-D401TDB-_-22-152-420-_-Product

unmenu hdparm lighttpd ssmtp status email monthly parity check reiserfsprogs rsync SMART tools

Running 5.04 with a 5TB parity drive Just be sure your hardware supports the larger drives.

may or may not help. I had a similar issue when I upgraded to UnRaid 5. The fix was to reboot the Windows boxes that could not get in.

tower1: 26 TB (full) all movies tower2: 12 TB so far, 5.5 TB free (99% movies, PC backups, music, pictures)

Western Digital Red NAS Hard Drive WD30EFRX 3TB IntelliPower 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive expires 11:59 PM PST 4/27 promo code: EMCPFHE86 ps. forgot link! http://www.newegg.com/Product/Product.aspx?Item=N82E16822236344

TOSHIBA MD04ACA500_xxxxx (sdb) 4883770532 * 5 TB Linux 3.9.11p-unRAID. root@Tower:~# hdparm -N /dev/sdb /dev/sdb: max sectors = 9767541168/9767541168, HPA is disabled

I am thinking it actually was "HPA?" on the other box I precleared it on and I was just looking at the wrong view. I will go with your Plan A suggestion... if I run across a 5TB that is larger, it becomes the parity drive I have both boxes churning right now (tower2 preclearing tower1's old parity to be new data drive and tower1 rebuilding parity on 5TB). Hate to disturb them when they are working lol