January 15, 201115 yr i haven't made any hardware changes for months. i'm using the latest unraid version 4.6. the tower was working fine yesterday. i did a clean power down last night and discovered the problem when i turned it on this morning. i inspected all cable connections and everything looks fine. nothing accidentally became loose. the two drives that are "missing" appear to be powered up. syslog attached syslog-2011-01-152.txt
January 15, 201115 yr Does your BIOS see those drives? The syslog shows that the disk controller was repeatadly reset, but it gave up after a while. Jan 15 09:58:45 Tower kernel: ata1.00: link is slow to respond, please be patient (ready=0) Jan 15 09:58:45 Tower kernel: ata1.00: SRST failed (errno=-16) Jan 15 09:58:45 Tower kernel: ata1.00: link is slow to respond, please be patient (ready=0) Jan 15 09:58:45 Tower kernel: ata1.00: SRST failed (errno=-16) Jan 15 09:58:45 Tower kernel: ata1.00: link is slow to respond, please be patient (ready=0) Jan 15 09:58:45 Tower kernel: ata1.00: SRST failed (errno=-16) Jan 15 09:58:45 Tower kernel: ata1.00: limiting SATA link speed to 1.5 Gbps Jan 15 09:58:45 Tower kernel: ata1.01: limiting SATA link speed to 1.5 Gbps Jan 15 09:58:45 Tower kernel: ata1.00: SRST failed (errno=-16) Jan 15 09:58:45 Tower kernel: ata1.00: reset failed, giving up Check all power connections, including those to the motherboard. It is almost certainly not the disks if both went missing at the exact same time. It could be a power splitter, a disk controller card, memory, or a defective motherboard (if plugged into a disk controller on it) or, it could be one disk blocking another paired with it on the same disk controller. Try un-plugging one of the two "missing" drives and see if the other re-appears. Joe L.
January 15, 201115 yr Author Unraid says the drives plugged into SATA2 and SATA6 are both "missing." The BIOS does not see the drive in SATA6, but it DOES see SATA2. With SATA6 unplugged, unraid now reads SATA2. (The reverse does not work. if you unplug only SATA2 then both are still missing). The disk controller is on the mobo. Do I need a new motherboard or to just replace disk 6?
January 15, 201115 yr Unraid says the drives plugged into SATA2 and SATA6 are both "missing." The BIOS does not see the drive in SATA6, but it DOES see SATA2. With SATA6 unplugged, unraid now reads SATA2. (The reverse does not work. if you unplug only SATA2 then both are still missing). The disk controller is on the mobo. Do I need a new motherboard or to just replace disk 6? We have no way of knowing. But installing a new disk is probably easier than changing the motherboard.
January 15, 201115 yr Try hooking a good drive (say the one on SATA6) to the SATA2 port and see if it's recognized. If yes, it's likely the drive that failed. Peter
January 15, 201115 yr Author When I plug the drive from SATA2 into SATA6 it does not work. This drive DOES work in SATA2 though. If I plug the drive from SATA1 into SATA6 it DOES work. This prove that the port is not broken, but what happened above is still strange. After some experimenting, the drive from SATA6 doesn't work in any port. I think this is the culprit. Joe: How does one disk "block" another?
January 16, 201115 yr It might block another drive by reporting wrong data or garbage or other forms of signal corruption on the bus, thus confusing or preventing the system from proceeding onto other drives.
January 16, 201115 yr Author Thank you everyone. Replacing the drive fixed this. The dead one was definitely blocking the other drive.
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