Service arrangements for old JB7 units and help to upload content from usb drive to unit

[Trevor Wales]

Hello. 
Good morning. I have two  JB7 units i purchased from ebay. 
Rob Lawes from Brennan has helped in the past but I can no longer contact Rob for some reason. I hope he is well. 
Could anyone advise who is carrying out service on old Brennan units as I would like to have the FTD replaced on my second spare unit and although I have emailed at least two or three times since last October I have yet to have a reply. 
Also can anyone guide me through how to upload content from a backup from one unit to another. I backed up onto my official Brennan USB hard drive i bought from them last year and everything is there. When I tried music restore as the instructions suggested on my spare unit it seemed to complete all 9788 songs within the space of a half an hour as when I came to check on the status just the time was showing. Upon checking the transfer has not happened. Should I be using upload or music restore function please? 

[Peter Lowham]

Hi Trevor,

Paul advises that the Brennan's service agent is - "AudioTech - now handle all JB7 repairs on our behalf. Please contact them on -   audiotechcontact   @   gmail   .   com   - no spaces".

Looking at your situation, if the backup (using 'Backup music' from your first JB7 unit is good, then it should have restored (using 'Restore music') onto your second JB7.  However there is a clue here that the restore of 9788 tracks ran in 30 minutes.  There is something wrong there; either the 'Backup music' did not work correctly or the 'Restore music' did not work.

I need to state first that I don't yet have a JB7 to verify the following figures.  I have just purchased one from eBay, with delivery by the end of this week so I will get a chance to check the data transfer rates then.  The figures that I do have are from feedback from two or three JB7 owners whom I have advised in the past.

 I've run an estimate and have come up with some figures to work with.

For the purposes of these calculations, I'm assuming that you have 9788 tracks compressed at 192Kb/s.  If this assumption is incorrect, just post here the actual compression rate that you are using (or 'None' if stored as 'wav' files) and I can do a quick recalculation.

That gives 'JB7 Total disk used' of about 70GB

The JB7 'Backup music' runs at about 1.2GB/hr (I estimate) so should run for 60 hours

I think that the 'Restore music' should run at about the same rate (I estimate) as the Backup so the restore should take 60 hours.

You have plugged the backup HDD into a PC or Mac to check the files.  As long as the music tracks are all there and are in the prescribed format and the volume of the backup is around 70GB then the restore should work, but it will take around 60 hours to complete.  This is because the USB port only runs at USB1.1 @ 12Mbits/sec.   Compare this to a B2 which is USB2 rated at 480Mbits/sec.  So the JB7 USB port is very slow by today's standards.

Then it a case of working out where the failure is.

Let us know how you get on.

Regards,

Peter.

[PMB]

Hi Trevor,

Have you been emailing AudioTech or Rob directly?

Paul

Brennan Support.

[Peter Lowham]

Hi Trevor,

I received my JB7 today and have run some basic timing tests with music tracks and folders.  Based on these tests, I have updated my data transfer figures as follows.  The actual JB7 transfer rate is about 1.5GB/hour (increased from my original estimate of 1.2GB/hour).

I used   USB Functions --> Backup music    --  to copy the music collection from the JB7 to the USB device.

I used   USB Functions --> Restore music    -- to copy the music collection back from the USB device to the JB7

Again based on a data volume of 9788 tracks of 70GB, the 'Backup music' process should have taken 48 hours.

The 'Restore music' process onto your second JB7 should also require about 48 hours.

Regards,

Peter.

[Peter Lowham]

Hi Trevor,

I have now done a number of larger scale 'Backup music' and 'Restore music' processes on my JB7 and have refined my estimates as follows.

The 'Backup' process, if sized at 70GB will take about 47 hours to complete.

The 'Restore' process, if sized at 70GB will take about 37 hours to complete.

Regards,

Peter.