Cdrom audio permissions in udev through USB hub

Connection of the HDD via USB adapter through a USB 4-port hub , then to the computer USB connector does not permit hdparm to recognize the HDD.
Connection of the USB adapter directly to the computer USB connector permits hdparm to recognize the drive
Command hdparm -tT /dev/sdb produces correct output with the USB adapter connected to the computer USB connector.
What command should be used ,if any, when the USB 4 port hub is included in the interface?
The effects of the hub would then be determined.....

My setup is a bit different.
I have the hub connected to the comp USB. The USB audio adapter is outputted from the hub. In addition, a USB to IDE powered adapter is outputted.
The USB adapter feeds IDE output to an IDE cable with 5 devices connected. Each of the 5 devices has power connected to them via "Y" cables modified to permit 5Volt line to be switched to select the IDE device to be powered "on".
I have 3 HDD and a cdr/w/dvdrom connected to the IDE cable.
The selection in the computer is established by fstab, using the same device:
/dev/sdc1 /mnt/dvd-ext udf ro,users,noauto,unhide 0 0
/dev/scd1 /mnt/dvd-ext iso9660 rw,users,noauto,unhide 0 0
/dev/scd1 /mnt/cdrom-ext iso9660 rw,users,noauto,unhide 0 0
/dev/scd1 /mnt/cdrom-ext iso9660 ro,users,noauto,unhide 0 0
/dev/sdb1 /mnt/sdb1 ntfs defaults 0 0
/dev/sdb1 /mnt/sdb1 vfat defaults 0 0
/dev/sdb1 /mnt/sdb3 ext3 defaults 0 0
I have been able to burn a CD via K3b with this arrangement.
This setup allows only one device to run or none(with adapter power off).
I was having trouble with ID's which has been better organized now.
The USB adapter shares bandwidth with the USB audio.
The 12Volt line is connected to all devices on the IDE 5 device cable, and the 5v is selected by a switch.
In operation, turn off adapter power, select device, turn adapter power on.
Computer recognizes the device...with the roms, insertion of a disc starts the computer recognition.
I apologize for my stumbling over this interface which was new since the new 2.6.15 upgrade.
I also have selectable HDD's in primary IDE with selection made before boot by single pin connector interface. No bios call needed.
Thus, only one HDD running inside the case, less heat and power dissipation. I expect I could install four or five on an 80 strand IDE cable, enabling booting on alternate OS'es without using dual booting ,( which if one makes a mistake loses all partitions). I do make mistakes!
Hope you can appreciate my arrangement which attempts to reduce power needs and lower case temps. Not an automated selection process but a power saving setup.
Have to find a case for the devices, now!
Many thanks for your responses

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Hi BD,
Thanks for saving me. And thanks for responding so quickly. Your answer was there when I got up. For me 48 hours was a long time to go without that function.
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Cdrom audio permissions in udev through USB hub

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