Date: Sun, 16 Mar 2014 16:29:43 -0500 From: cruxpot <cruxpot@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: Another case of the vanishing disk Message-ID: <CAPYfQ9zGFYRfn2mKzrT%2BPiF%2B-Ve03gn3GFg2Byst0XaMQUC=1A@mail.gmail.com> In-Reply-To: <5325E71D.30800@bluerosetech.com> References: <CAPYfQ9z-YUzKDAh3=V3_m1wmDtds4NzcewTq0wLUD9LWt3VaGA@mail.gmail.com> <20140316130936.3f2d18e0@X220.alogt.com> <CAPYfQ9ycxEr%2B-qPBC6qY6tvLrTMqT3guU%2B8q%2BbK2_RAj=WH1tw@mail.gmail.com> <20140316134309.2edc258a@X220.alogt.com> <CAPYfQ9ztmzYWSRoNLJk2Z-mTAdDti48ZOJrKT0LEEpuWf5SqHg@mail.gmail.com> <5325E71D.30800@bluerosetech.com>
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Hi all, I am leaning towards the Green hard drive problem myself. I do not have all the drives on one rail. I have them separated on the two rails that have the SATA 15-pin connectors, two hard drives on each. The CD-ROM is connected to a Molex connector on a separate rail. I think the power is more than sufficient and like I said, I did move the system to plug it into a surge protector and it's not on the UPS at the moment even though I would like it on the UPS (which is not active PFC but I have seen no other problems). I looked at the firmware for this drive and all of them have the latest CC32 revision so that is not the issue. I am thinking I need something in FreeBSD to keep the drives awake, the way you can do it in Windows Power Settings or using nosleep programs. I will look at the sysutils/ataidle port and see if that can do it. I do not see any official Seagate utilities for modifying the firmware settings of the Barracuda Green drives but if I am mistaken, please let me know. I guess I did shoot myself in the foot on buying these drives, but they were $75/each at Best Buy on a sale about two years ago and I thought it was too good to pass up. I will report back to the list about my progress since the issue may be somewhat common with these cheaper drives in NAS systems. Thanks. On Sun, Mar 16, 2014 at 1:02 PM, Darren Pilgrim <list_freebsd@bluerosetech.com> wrote: > On 3/15/2014 11:04 PM, cruxpot wrote: >> >> Back in December, it was the power supply. That was a cheap Rosewill >> 300W PSU. The new is a Corsair CX500 (500W). The system basically just >> has an old SCSI card and 4 Green Barracuda 2TB disks and a low end >> pci-e video card and pci-e gigabit NIC. How can the PSU be the problem >> since I replaced it and it's more than adequate? > > > How are the drives connected to the power supply? Are they all on the same > rails or are they spread across mutliple sets of rails? > > Be aware that you may have shot yourself in the foot buying "green" drives. > Drives not designed for use in NAS/RAID usually have firmware that expects > the machine to sleep the disks and be tolerant of delayed responses. The > drives get to be cheaper because the controller has more "offline" time to > fix errors due to higher tolerance parts. In some cases (like certain WD > disks), the drives eventually start dropping off the port because they're > going into an offline error recovery mode and take too long to respond. On > a regular desktop, the OS knows to wait because the drive was signalled into > a sleep mode. That doesn't happen in a server and you really don't want it > to happen in a server. > > I'm betting that even if you had each drive on its own +3.3v, +5v and +12v > rails, a line-interactive UPS and a server-grade power supply, you'll still > have dropouts. >
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