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Hi, we're having trouble with new LSI MegaRaid cards we have purchased and are using under Linux (2.6 kernel). Both a 320-1 and a 320-2x are installed with 8 SCSI ...
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  1. #1
    Linux Newbie humbletech99's Avatar
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    Nov 2005
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    LSI Megaraid SCSI problems


    Hi,
    we're having trouble with new LSI MegaRaid cards we have purchased and are using under Linux (2.6 kernel). Both a 320-1 and a 320-2x are installed with 8 SCSI Ultra320 disks on the first and 16 on the second. The SCSI disks are all configured in pairs as Raid1s but the performance is less than that of an old machine of ours and the logs show errors regarding drive cache. We will not be buying another one of these unless we can get decent stable performance out of it.
    The relevant logs are follow:
    Code:
    SCSI subsystem initialized
    megaraid cmm: 2.20.2.6 (Release Date: Mon Mar 7 00:01:03 EST 2005)
    megaraid: 2.20.4.6 (Release Date: Mon Mar 07 12:27:22 EST 2005)
    megaraid: probe new device 0x1000:0x1960:0x1000:0x0520: bus 9:slot 2:func 0
    ACPI: PCI interrupt 0000:09:02.0[A] -> GSI 26 (level, low) -> IRQ 217
    megaraid: fw version:[1L37] bios version:[G119]
    scsi0 : LSI Logic MegaRAID driver
    scsi[0]: scanning scsi channel 0 [Phy 0] for non-raid devices
    scsi[0]: scanning scsi channel 1 [virtual] for logical drives
     Vendor: MegaRAID  Model: LD0 RAID1 40200R  Rev: 1L37
     Type:   Direct-Access                      ANSI SCSI revision: 02
    SCSI device sda: 287129600 512-byte hdwr sectors (147010 MB)
    sda: asking for cache data failed
    sda: assuming drive cache: write through
    SCSI device sda: 287129600 512-byte hdwr sectors (147010 MB)
    sda: asking for cache data failed
    sda: assuming drive cache: write through
    sda: sda1
    Attached scsi disk sda at scsi0, channel 1, id 0, lun 0
     Vendor: MegaRAID  Model: LD1 RAID1 40271R  Rev: 1L37
     Type:   Direct-Access                      ANSI SCSI revision: 02
    SCSI device sdb: 287275008 512-byte hdwr sectors (147085 MB)
    sdb: asking for cache data failed
    sdb: assuming drive cache: write through
    SCSI device sdb: 287275008 512-byte hdwr sectors (147085 MB)
    sdb: asking for cache data failed
    sdb: assuming drive cache: write through
    sdb: sdb1
    Attached scsi disk sdb at scsi0, channel 1, id 1, lun 0
     Vendor: MegaRAID  Model: LD2 RAID1 40271R  Rev: 1L37
     Type:   Direct-Access                      ANSI SCSI revision: 02
    Anybody know anything about this?
    Last edited by bigtomrodney; 02-22-2008 at 10:49 AM.

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