May 19, 201610 yr Community Expert The picture shows that your PSU has +12V1 and +12V2, in other words dual rail, not recommended for unRAID. Only half of the power is available to your drives. This is probably the issue.
May 19, 201610 yr I stand corrected its a 460 watt power supply pic is attached. Server is a rackmount, no monitor, just the usb key to run unraid. It always used all 6 drives till i came to unraid last month....I was doing a mirrored array for windows, and 4 disk raid5 setup for the last two years to store media. I wanted something to do GPT and use all 6 drives thus i found unraid and now now im just trying to get back to all 6 drives and a bigger parity disk for future growth 16 gig memory 2 quad core proc's gig network 32 gig usb drive You're seriously underpowered on PSU if you're running 2 Quad-Core CPUs.
May 19, 201610 yr Author for the procs.... each chip runs at Max TDP: 115 W, times 2.....with 5 SATA 5.4k drives no other extra cards...just the integrated motherboards chips this site has me at 367watts with a recommened 417watt power supply needed http://outervision.com/power-supply-calculator guess under powered would not have been my first though.....as I have ran this server with all 6 drives for years with windows and never lost a drive...i'll look to see what i can do to get a larger powersupply in it to maybe rule that out.
May 20, 201610 yr Author Found a 600 watt dual rail... psu.... but I'm guessing that won't help much....? Seems like I might need to buy a new case to be able to put in a different psu
May 20, 201610 yr Author so i stuck 3 smaller drives in MBR partitioned....they all spun up with no issue... i have rebuilt parity, and checked parity with 6 drives in the server....running stable longer than i ever have.. since trying to replace the parity drive... if we put the psu thought aside for a moment, is there any known issues\challenges using an older motherboard with unraid and GPT disks? All disks I have been having issues with are 3 TB in size?
May 20, 201610 yr Community Expert if we put the psu thought aside for a moment, is there any known issues\challenges using an older motherboard with unraid and GPT disks? All disks I have been having issues with are 3 TB in size? Possibly, if RobJ is right (and he usually is) about the SMART indicator, together with this SMART report from one of the diagnostics: === START OF INFORMATION SECTION === Device Model: C WD30EZRX-00MMMB0 € Serial Number: WD-WCAWZ2748415 Firmware Version: .00A80WD Device is: Not in smartctl database [for details use: -P showall] ATA Version is: Unknown(0x0000) (unknown minor revision code: 0x746b) Local Time is: Thu May 19 06:38:26 2016 CST SMART support is: Available - device has SMART capability. SMART support is: Enabled Warning! SMART Attribute Data Structure error: invalid SMART checksum. Warning! SMART Attribute Thresholds Structure error: invalid SMART checksum. Do you have an addon controller you could try?
May 20, 201610 yr Author doesn't look I have one I can find right now..... if you had to suggest a card and external HDD enclosure..... there any cheaper options then the icy docks? I like this server as it can chew through multiple plex transcoding with out stuttering.....but dont want to throw good money after bad. Screen shot below of it running 6 drives now....calculated parity no errors, doing a check now....but all drives are MBR, no idea if thats related, but my issues all revolve around GPT
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