10.4.9 update, external FW drives no longer power down when ejected?!?!?!

this is really odd. and i have reverted to 10.4.8 until i can find a solution.
i have two different fw400/usb20 external cases. inside each is a 200gb ata hd.
now before 10.4.9, when i ejected the disks from the desktop, they would not only eject, but POWER DOWN as well.
now, when i eject, they dont power down. This was really one of the great things about fw400 drives, and i loved it.
whats the deal here?
the drive enclosures are a Macally 100ac, and a Macally 500bc.

You're not alone. I have three Macally PHR-100AC drives, with a 200 and 300 GB Maxtor drive, and a 320 GB Western Digital drive. All are exhibiting the same behaviour:
The drives don't spin down like the Energy Saver "Spin down hard drives when possible" checkbox is checked (or, for the Terminal-minded, my "pmset -g disk" tells me disksleep is set to 5.) The drives also do not spin down when I eject the drives, as you said. I've tested it over USB 2.0 and Firewire: it exhibits the same behaviour on both.
There are threads at AppleNova (http://forums.applenova.com/showthread.php?t=22914) and MacOSXHints (http://forums.macosxhints.com/showthread.php?t=69428&page=2) with people with the same problem.
I've tested the drives on another system, and they still spin down properly, so the 10.4.9 update didn't permanently damage the drive chipsets.
I emailed Macally, and they said, "Well, that *****, tell Apple."
I have a 2.5" Firewire external drive from EZQuest that still spins down properly upon idle or upon ejection, so it's not like 10.4.9 completely killed that ability.
I'm posting a bug now to Apple's Bug Report form. We'll see where it goes from there.

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I have a MacBook Pro, 10.10.2 Yosemite. My external hard drive no longer appears on my screen or in Time Machine

I have a MacBook Pro, 10.10.2 Yosemite. My external hard drive no longer appears on my screen or in Time Machine. I have gone into Disc Utility to repair disc, and get the message: Error: Partition map check failed because no slices were found. I was trying to follow Melophage's instructions by going into "Terminal" and entering "diskutil list; diskutil cs list; mount" and "diskutil info disk2." Then I entered the command "sudo got show disk1."   I am sure I have made the problem worse. Can you give me some help? Thank you. blelambert
Last login: Wed Mar 11 19:23:03 on ttys000
~ belambert$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         250.1 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *249.8 GB   disk1
                                 Logical Volume on disk0s2
                                 7A998EAE-68FB-4BAC-BF40-7A31D2806B2C
                                 Unlocked Encrypted
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *2.0 TB     disk2
   1:         Microsoft Reserved                         134.2 MB   disk2s1
~ belambert$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 883A56F4-5559-4872-A8DA-960F99655B63
    =========================================================
    Name:         Macintosh HD
Status:       Online
    Size:         250140434432 B (250.1 GB)
    Free Space:   8921088 B (8.9 MB)
    |
    +-< Physical Volume 7EDAFA20-FF9A-45FB-BA44-6526BB46C381
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     250140434432 B (250.1 GB)
    |
    +-> Logical Volume Family B47B0B40-CBF2-4D02-BFEF-182061AC6F8E
        Encryption Status:       Unlocked
        Encryption Type:         AES-XTS
        Conversion Status:       Complete
        Conversion Direction:    -none-
        Has Encrypted Extents:   Yes
        Fully Secure:            Yes
        Passphrase Required:     Yes
        |
        +-> Logical Volume 7A998EAE-68FB-4BAC-BF40-7A31D2806B2C
            Disk:                  disk1
            Status:                Online
            Size (Total):          249779191808 B (249.8 GB)
            Conversion Progress:   -none-
            Revertible:            Yes (unlock and decryption required)
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS
~ belambert$ mount
/dev/disk1 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
localhost:/vB3z604U-dvSpES6320fHq on /Volumes/MobileBackups (mtmfs, nosuid, read-only, nobrowse)
~ belambert$ diskutil info disk2
   Device Identifier:        disk2
   Device Node:              /dev/disk2
   Part of Whole:            disk2
   Device / Media Name:      WD My Book 111A Media
File System:              None
   Content (IOContent):      GUID_partition_scheme
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 USB
   SMART Status:             Not Supported
   Total Size:               2.0 TB (2000365289472 Bytes) (exactly 3906963456 512-Byte-Units)
   Volume Free Space:        Not applicable (no file system)
   Device Block Size:        512 Bytes
   Read-Only Media:          No
   Read-Only Volume:         Not applicable (no file system)
   Ejectable:                Yes
File System:              None
   Content (IOContent):      GUID_partition_scheme
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 USB
   SMART Status:             Not Supported
   Total Size:               2.0 TB (2000365289472 Bytes) (exactly 3906963456 512-Byte-Units)
   Volume Free Space:        Not applicable (no file system)
   Device Block Size:        512 Bytes
   Read-Only Media:          No
   Read-Only Volume:         Not applicable (no file system)
   Ejectable:                Yes
belambert ttys000                   Wed Mar 11 17:34 - 17:39 (00:05)
belambert ttys000                   Wed Mar 11 17:33 - 17:34 (00:00)
wtmp begins Sun Mar 8 14:40
~ belambert$ ~ belambert$ diskutil list
-bash: :~: command not found
~ belambert$ /dev/disk0
-bash: /dev/disk0: Permission denied
:~ belambert$    #:                       TYPE NAME                    SIZE       IDENTIFIER
~ belambert$    0:      GUID_partition_scheme                        *251.0 GB   disk0
-bash: 0:: command not found
:~ belambert$    1:                        EFI EFI                     209.7 MB   disk0s1
-bash: 1:: command not found
~ belambert$    2:          Apple_CoreStorage                         250.1 GB   disk0s2
-bash: 2:: command not found
~ belambert$    3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
-bash: /dev/disk1: Permission denied
~ belambert$    #:                       TYPE NAME                    SIZE       IDENTIFIER
~ belambert$    0:                  Apple_HFS Macintosh HD           *249.8 GB   disk1
-bash: 0:: command not found
~ belambert$                                  Logical Volume on disk0s2
-bash: Logical: command not found
~ belambert$                                  7A998EAE-68FB-4BAC-BF40-7A31D2806B2C
-bash: 7A998EAE-68FB-4BAC-BF40-7A31D2806B2C: command not found
~ belambert$                                  Unlocked Encrypted
-bash: Unlocked: command not found
:~ belambert$ /dev/disk2
-bash: /dev/disk2: Permission denied
~ belambert$    #:                       TYPE NAME                    SIZE       IDENTIFIER
:~ belambert$    0:      GUID_partition_scheme                        *2.0 TB     disk2
-bash: 0:: command not found
~ belambert$    1:         Microsoft Reserved                         134.2 MB   disk2s1
-bash: 1:: command not found
~ belambert$ ~ belambert$ diskutil cs list
-bash: ~: command not found
~ belambert$ CoreStorage logical volume groups (1 found)
-bash: syntax error near unexpected token `('
~ belambert$ |
-bash: syntax error near unexpected token `|'
~ belambert$ +-- Logical Volume Group 883A56F4-5559-4872-A8DA-960F99655B63
-bash: +--: command not found
~ belambert$     =========================================================
-bash: =========================================================: command not found
~ belambert$     Name:         Macintosh HD
-bash: Name:: command not found
~ belambert$
-bash: 3:: command not found
~ belambert$ /dev/disk1
   Whole:                    Yes
   Internal:                 No
   OS 9 Drivers:             No
   Low Level Format:         Not supported
:~ belambert$ Last login: Wed Mar 11 19:23:03 on ttys000
~ belambert$ diskutil list
   Whole:                    Yes
   Internal:                 No
   OS 9 Drivers:             No
   Low Level Format:         Not supported
~ belambert$ Last login: Wed Mar 11 19:23:03 on ttys000
~ belambert$ diskutil list
   Volume Name:              Not applicable (no file system)
   Mounted:                  Not applicable (no file system)

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10.4.9 update, external FW drives no longer power down when ejected?!?!?!

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