Can not dump on raid dev?

From: Kang Liu (liukang_at_bjpu.edu.cn)
Date: 09/29/03

  • Next message: Poul-Henning Kamp: "Re: Can not dump on raid dev?" 
    To: <freebsd-hackers@freebsd.org>
Date: Mon, 29 Sep 2003 15:35:11 +0800

    Hi,
            I'm trying to save a crashdump into /var/crash but it fails.
    Here is my config files:
    # dmesg | grep amr
    amr0: <LSILogic MegaRAID> mem 0xf0000000-0xf7ffffff irq 3 at device 0.0 on pci3
    amr0: <LSILogic PERC 3/DC> Firmware 1.92, BIOS 3.31, 128MB RAM
    amrd0: <LSILogic MegaRAID logical drive> on amr0
    amrd0: 17278MB (35385344 sectors) RAID 0 (optimal)
    GEOM: create disk amrd0 dp=0xc7de088c
    amrd1: <LSILogic MegaRAID logical drive> on amr0
    amrd1: 51834MB (106156032 sectors) RAID 0 (optimal)
    GEOM: create disk amrd1 dp=0xc7de078c
    ses0 at amr0 bus 0 target 6 lun 0
    Mounting root from ufs:/dev/amrd0s1a

    in rc.conf:
    dumpdev="/dev/amrd0s1b"
    dumpdir="/var/crash"

    in my kernel conf-file:
    options DDB
    option DDB_UNATTENDED
    makeoptions DEBUG=-g

    # disklabel -r /dev/amrd0
    # /dev/amrd0:
    8 partitions:
    # size offset fstype [fsize bsize bps/cpg]
      a: 524288 0 4.2BSD 2048 16384 32776
      b: 8345024 524288 swap
      c: 35385344 0 unused 0 0 # "raw" part, don't edit
      d: 524288 8869312 4.2BSD 2048 16384 32776
      e: 524288 9393600 4.2BSD 2048 16384 32776
      f: 25467456 9917888 4.2BSD 2048 16384 28552

    # cat /etc/fstab |grep amrd0s1b
    /dev/amrd0s1b none dump sw 0 0

    #before I start the test, I run "dumpon -v /dev/amrd0s1b". It seems ok.
    # dumpon -v /dev/amrd0s1b
    kernel dumps on /dev/amrd0s1b

    when the system crashes, it doesn't save any crashdump.
    I've tried the same config on a machine with IDE disk, the crashdump can be saved.
    Do I miss something, or the crashdump can not be saved on a raid device?

    Kang.

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