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Old 11-11-2010, 09:05 PM
 
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Quote:
Originally Posted by Charles View Post
The other thing is I think PDF are highly compressible so that 31 gigs over 13800 files can be converted a 20 gig single file. May be a lot faster.
PDFs are already compressed. Additional compression will not save much space.
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Old 11-11-2010, 09:07 PM
 
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Quote:
Originally Posted by Jesse69 View Post
I can't compress it because I want the files to be read off the Hitachi also. Funny how it says it'll take 1 day to transfer 31gb.

I used a QNAP TS-509 Pro for my real backups, but I think 1 drive went bad in my RAID 5 array so I gotta back things up on this slow Hitachi.

USB 2.0 should do 60mb/sec transfers though.
Can't you rebuild the RAID 5 by just plopping a new drive back in?
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Old 11-11-2010, 09:09 PM
 
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Quote:
Originally Posted by Narfcake View Post
What OS are you in? If it's XP, it will work at an absolute snail pace with the new advanced format drives.
This could be the problem. OP do you have one of the newer Advanced Format drives?

If so, try this tool on the external: index | Advanced Format Drives
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Old 11-11-2010, 09:35 PM
 
Location: Wicker Park, Chicago
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Thanks for the Richcopy advice, SLippi! I will try it on my next megafile copy.

I'm on Vista 64 with 12gb ddr3 on an Asus P6T Deluxe i7 920 computer.

My TS 509 Pro one day said "Hard drive 4 ejected" - a message that this hd is bad. But now when I turn it on it no longer gives this error message or a flashing red error light on the box. So I have to ask advice on the QNAP forum about this. Maybe all data was rebuilt to exist on 4 drives now instead of 5. But backups to this NAS are sure way faster than a USB 2.0 external drive backup.

I tried the Advanced Format Drive questionnaire and it said I didn't need the Alignment Tool.

Boy, this experience really now makes me think USB 2.0 external drives are too slow for major backups!
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Old 11-11-2010, 10:23 PM
 
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USB 2.0 is slow and generally a poor choice nowadays (especially on a computer as up-to-date) as yours.

I'm not certain how much you know about RAID 5, but the if you initially had 5 drives in the array, and one dropped, the remaining 4 will have all the data accessible without redundancy. In order to add redundancy back in, you need to add a 5th drive back and rebuild the array. I doubt the QNAP can rebuild an array as a RAID 5 with -1 drive on the fly. Not even my Netgear ReadyNAS PRO has that functionality.
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Old 11-11-2010, 11:07 PM
 
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Quote:
Originally Posted by Jesse69 View Post
Boy, this experience really now makes me think USB 2.0 external drives are too slow for major backups!
At that speed it would be.

Try Properties> Hardware > Properties > Policies and make sure Optimize for Performance" is checked.

Another question is it connected directly to a port on the back of the computer? Tried a different cable? Tried different port?
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Old 11-11-2010, 11:37 PM
 
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USB2 pushes about 12 Mbits per second if you're lucky. Transfering some 13,000 small files is going to kill your speeds. I'm thinking you can try sticking them into an RAR or ZIP, transfer it that way?
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Old 11-12-2010, 12:11 AM
 
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Quote:
Originally Posted by Konraden View Post
USB2 pushes about 12 Mbits per second if you're lucky.
Certainly go faster than that, I've done long DV transfers to an external USB2 drive and that requires a sustained datarate of about 25mbps.

Camcorder >> Firewire >> Computer >> USB2 >> External Drive


Technically it will go even faster than that but the key here for DV is "sustained" hence the reason firewire which has slower but much more reliable data rate is used for DV transfers.
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Old 11-12-2010, 12:32 AM
 
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Quote:
Originally Posted by thecoalman View Post
Certainly go faster than that, I've done long DV transfers to an external USB2 drive and that requires a sustained datarate of about 25mbps.

Camcorder >> Firewire >> Computer >> USB2 >> External Drive


Technically it will go even faster than that but the key here for DV is "sustained" hence the reason firewire which has slower but much more reliable data rate is used for DV transfers.
I suspect your computer must have been caching some of that. Firewire is a streaming protocol versus USBs burst transmission rates. I goofed. USB is 12 Megabits, 2.0 is 480 Mbps.
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Old 11-12-2010, 12:48 AM
 
40,289 posts, read 41,836,137 times
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Quote:
Originally Posted by Konraden View Post
I suspect your computer must have been caching some of that. Firewire is a streaming protocol versus USBs burst transmission rates.
Certainly possible to prevent any issues with the sustained rate but it wasn't writing any data when the transfer was finished.
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