3ware 9750 and WD20EADS

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viper14

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Aug 22, 2010
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Hi everyone I'm currently building a new file server with a 3ware 9750-8i card, using sff-8087 to a chenbro 28 port sas expander, and from there 5 sff-8087 cables to a norco 4220 case, i have 10 WD20EADS drives (older model with TLER support), in RAID6 (14.55TB usable) I've enabled TLER R/W for 7 sec on every drive, I've also used wdidle3 to disable the head parking after 8 sec of idle, so took a day or so to build the array and now that its up and running my server OS is on a 80gb SSD drive (centos 5.5), kernel 2.6, I've used the XFS file system on the drive I've tried multiple ways even just a basic mkfs.xfs /dev/sdb1 no matter what every time i do any type of disk I/O on the raid set, it randomly drops every disk i check the 3DM2 web service and it shows the array as INOPERABLE, soon as i reboot the array goes into verify mode and within 2 min its back to OK, not sure whats goin on or if anyone has any idea on what tit might be I've tried 3ware support and i need to send them some logs but it doesn't seem like they will be much help since I'm running the WD green drives and there not on the supported list. has anyone ever seen anything like this happen, not sure how to fix this problem or even determine whats wrong.

Thanks
 
i have a 2nd array built on the same card/expander of 1TB wd green drives and it dosnt seem to have any issues. I've sent 3ware the logs and this was there response "You have some major power cycle issues with these drives. Note that these are desktop drives, not enterprise drives. This type of behavior is common with drives not designed for use with RAID controllers. I recommend upgrading to enterprise class drives." so it seems maybe theres still some sort of power issues with the green drives even tho i used wdidle3 to dissable the 8 sec idle headpark, not sure what elese i can do maybe somthing has changed in the 2tb models vs the 1tb models because my 1tb set works no prob i can copy data to it all day and not have any issues.
 
Many of us are running WD20EADS drives w/TLER on without major hassles. There has to be some other variable. Isolating the expander is a good first step.
 
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