External Disk Won't Mount

I've got two Maxtor external drives plugged to my iMac via Firewire and for suddenly one of them no longer mounts automatically upon startup. The other is fine. I tried turning it off and on and went into Disk Utility to see if there was some way to manually mount it but the Mount button is grayed out. Can anyone help.
Thanks.

Disconnect and power down both FWHDs, and follow the procedure in http://support.apple.com/kb/HT1379

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    Sharlo wrote:
    Hi V.K.,
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    Cait,
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  • DVD-Ram disks won't mount on Dual 450 - help!

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  • External HD Won't Mount, Only Shows up in Disk Utility

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  • My external HD won't mount anymore on Mac OS, Disk Warrior or TechTool Pro, but appears as "media" on Disk Utility. What do I do?

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  • External disc won't mount in Leopard, but will in Snow Leopard

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    May I hop onto your thread as I have a similar problem.
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  • Maxtor External Drive Won't Mount!

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    Check the /Volumes/ folder for a broken alias to the disk. The folder is invisible so you need to use the "Go" menu to open it.

  • Re: WD External drive won't mount

    Hi
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  • WD External drive won't mount

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    /dev/disk0
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:     Apple_partition_scheme                        *111.8 Gi   disk0
       1:        Apple_partition_map                         31.5 Ki    disk0s1
       2:             Apple_Driver43                         28.0 Ki    disk0s2
       3:             Apple_Driver43                         28.0 Ki    disk0s3
       4:           Apple_Driver_ATA                         28.0 Ki    disk0s4
       5:           Apple_Driver_ATA                         28.0 Ki    disk0s5
       6:             Apple_FWDriver                         256.0 Ki   disk0s6
       7:         Apple_Driver_IOKit                         256.0 Ki   disk0s7
       8:              Apple_Patches                         256.0 Ki   disk0s8
       9:                  Apple_HFS Mac Leopard II          91.8 Gi    disk0s10
      10:                  Apple_HFS Mac Tiger               19.7 Gi    disk0s12
    /dev/disk1
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:     Apple_partition_scheme                        *186.3 Gi   disk1
       1:        Apple_partition_map                         31.5 Ki    disk1s1
       2:             Apple_Driver43                         28.0 Ki    disk1s2
       3:             Apple_Driver43                         28.0 Ki    disk1s3
       4:           Apple_Driver_ATA                         28.0 Ki    disk1s4
       5:           Apple_Driver_ATA                         28.0 Ki    disk1s5
       6:             Apple_FWDriver                         256.0 Ki   disk1s6
       7:         Apple_Driver_IOKit                         256.0 Ki   disk1s7
       8:              Apple_Patches                         256.0 Ki   disk1s8
       9:                  Apple_HFS Mac Leopard I           186.2 Gi   disk1s10
    /dev/disk2
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:     Apple_partition_scheme                        *465.8 Gi   disk2
       1:        Apple_partition_map                         31.5 Ki    disk2s1
       2:             Apple_Driver43                         28.0 Ki    disk2s2
       3:             Apple_Driver43                         28.0 Ki    disk2s3
       4:           Apple_Driver_ATA                         28.0 Ki    disk2s4
       5:           Apple_Driver_ATA                         28.0 Ki    disk2s5
       6:             Apple_FWDriver                         256.0 Ki   disk2s6
       7:         Apple_Driver_IOKit                         256.0 Ki   disk2s7
       8:              Apple_Patches                         256.0 Ki   disk2s8
       9:                  Apple_HFS 500 GB HD               465.6 Gi   disk2s10
    /dev/disk3
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:     Apple_partition_scheme                        *931.5 Gi   disk3
       1:        Apple_partition_map                         31.5 Ki    disk3s1
       2:             Apple_Driver43                         28.0 Ki    disk3s2
       3:             Apple_Driver43                         28.0 Ki    disk3s3
       4:           Apple_Driver_ATA                         28.0 Ki    disk3s4
       5:           Apple_Driver_ATA                         28.0 Ki    disk3s5
       6:             Apple_FWDriver                         256.0 Ki   disk3s6
       7:         Apple_Driver_IOKit                         256.0 Ki   disk3s7
       8:              Apple_Patches                         256.0 Ki   disk3s8
       9:                  Apple_HFS 1 TB Music Drive II     931.4 Gi   disk3s10
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       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:     Apple_partition_scheme                        *931.5 Gi   disk4
       1:        Apple_partition_map                         31.5 Ki    disk4s1
       2:             Apple_Driver43                         28.0 Ki    disk4s2
       3:             Apple_Driver43                         28.0 Ki    disk4s3
       4:           Apple_Driver_ATA                         28.0 Ki    disk4s4
       5:           Apple_Driver_ATA                         28.0 Ki    disk4s5
       6:             Apple_FWDriver                         256.0 Ki   disk4s6
       7:         Apple_Driver_IOKit                         256.0 Ki   disk4s7
       8:              Apple_Patches                         256.0 Ki   disk4s8
       9:                  Apple_HFS 1TB Music Drive         931.4 Gi   disk4s10
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    Terminal info on disk4s10.
    Last login: Mon Feb 25 22:22:41 on ttys000
    raymond-medinas-power-mac-g4-agp-graphics:~ raymondmedina$ diskutil info disk4s10
       Device Identifier:        disk4s10
       Device Node:              /dev/disk4s10
       Part Of Whole:            disk4
       Device / Media Name:      Apple_HFS_Untitled_1
       Volume Name:              1TB Music Drive
       Mount Point:             
       File System:              Journaled HFS+
       Owners:                   Disabled
       Partition Type:           Apple_HFS
       Bootable:                 Is bootable
       Media Type:               Generic
       Protocol:                 FireWire
       SMART Status:             Not Supported
       Volume UUID:              61A8EAFF-E1C9-3605-AF92-5A210E3C781A
       Total Size:               931.4 Gi (1000069726208 B) (1953261184 512-byte blocks)
       Free Space:               0.0 B (0 B) (0 512-byte blocks)
       Read Only:                No
       Ejectable:                Yes
       Whole:                    No
       Internal:                 No
    Disk Utility Info on 1TB Music Drive.
    Name :
    1TB Music Drive
    Type :
    Volume
    Disk Identifier :
    disk4s10
    Mount Point :
    Not mounted
    File System :
    Mac OS Extended (Journaled)
    Connection Bus :
    FireWire
    Device Tree :
    IODeviceTree:fwx/node@90a9c5c29aa50b/sbp-2@c000
    Writable :
    Yes
    Universal Unique Identifier :
    61A8EAFF-E1C9-3605-AF92-5A210E3C781A
    Capacity :
    931.4 GB (1,000,069,726,208 Bytes)
    Owners Enabled :
    No
    Can Turn Owners Off :
    Yes
    Can Be Formatted :
    Yes
    Bootable :
    Yes
    Supports Journaling :
    Yes
    Journaled :
    No
    Disk Number :
    4
    Partition Number :
    10
    I've read that WD uses crappy chipsets in their external drives. I'm wondering if the chipset is suspect here? Just not sure. I did discover that I can clone the drive from my PC as an exact Mac OS Extended (Journaled) drive, and my Mac doesn't even know the difference. I've also read that I can initialize the drive, and reinsert the drivers, and the drive should function normally. Interesting, huh? Well, let me know what you come up with BDAqua. And again, many, many thanks.

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