Date: Mon, 17 Aug 2015 14:05:08 -0400 From: PK1048 <paul@pk1048.com> To: dweimer@dweimer.net Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Quick Hard Drive Error Question Message-ID: <6E95ACB0-EB0A-471E-9815-7B791DC25F67@pk1048.com> In-Reply-To: <46e87057b2ac9672e581dcd794bf1111@dweimer.net> References: <46e87057b2ac9672e581dcd794bf1111@dweimer.net>
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On Aug 17, 2015, at 8:56, dweimer <dweimer@dweimer.net> wrote: > I have an external SATA drive dock that I use to write backups to, I have steadily been getting more parity/CRC errors over the last couple of weeks. > > Aug 17 00:14:14 freebsd kernel: (ada4:ahcich5:0:0:0): WRITE_FPDMA_QUEUED. ACB: 61 00 70 e7 53 40 85 00 00 01 00 00 > Aug 17 00:14:14 freebsd kernel: (ada4:ahcich5:0:0:0): CAM status: Uncorrectable parity/CRC error > Aug 17 00:14:14 freebsd kernel: (ada4:ahcich5:0:0:0): Retrying command > Aug 17 00:14:14 freebsd kernel: (ada4:ahcich5:0:0:0): READ_FPDMA_QUEUED. ACB: 60 70 d0 c6 1c 40 84 00 00 00 00 00 > Aug 17 00:14:14 freebsd kernel: (ada4:ahcich5:0:0:0): CAM status: Uncorrectable parity/CRC error > Aug 17 00:14:14 freebsd kernel: (ada4:ahcich5:0:0:0): Retrying command > > I have ran smart tests on the drives, they report no errors, hers the most recent summary line from the currently mounted drive. Are there any port multipliers involved ? When I had 4 SATA drives behind a port multiplier I had these type of errors frequently under high load. I was using ZFS so dialed back the outstanding queue depth from 10 to 2 to reduce load and the errors went away. I have since gone to one port per drive (and went back to the default queue depth of 10) and have not had the problem recur… But, I have seen a “finicky-ness” between eSATA ports and cables. Certain cables work on certain ports but not on others. Have you tried substituting the eSATA cable ? A different eSATA port perhaps ?
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