Data Rate Issue

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caryjoy
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Joined: May 10 2005

We have been suffering with the performance of one of our editing systems (Studio 10.8) actually slowing down. Within the programme you can check the data rate required for transferring data, the Studio manual states 25000-35000Kbytes/sec is what is required. Carrying out the test to one of my drives the result comes back as only running at 16000Kbytes/sec but advises that this is OK for DV capture. Is this hard drive slowly failing?

Willow
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Joined: Aug 6 2002

This is a quick reply! – Delayed by responding to that Most Moderate of Moderators.

Cary

Perhaps you should do a second performance check.

There was a highly thought of program by Canopus named raptest, that was often bandied around this forum. Do a forum search for it.

Its not on the canopus site anymore as a download

I quickly googled it and have come up with

http://www.broadbandreports.com/faq/3498

If you go to the “here” link it will give you a download site.
Try that.

Also check for the cabling – 40pin IDE cables (the flat ones) - One trick to improve
Internal air flow is to bunch/ twist the cables together – THEN they have a tendency to break so try to upgrade to the round ones.

SATA – I have just got my first Sata drive’d PC so I don’t know too much the cables are more… smaller.
But if yours is a “old (no offense)” machine, I doubt if it has them.

Every drive is likely to fail soon!

branny
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Joined: Nov 6 2001

Hi Cary - is the drive getting hot? I had a similar problem this week and just managed to complete the edit by sticking the drive in the freezer for an hour. It does work and may save your bacon temporarily, but dump the drive and buy a couple of new ones.
They're cheap enough.

Do not follow, I may not lead. Do not lead . . . I may not follow.

harlequin
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Joined: Aug 16 2000

1. studio was notorious at returning bad info on drive speeds in older versions
2. drives do get slower as they fill up / fragment.
3. i may still have raptest , i'll sort out a place for it when i get home. ......
4. the larger ide drives do not like heat ..... i have killed 4x120gb , and 4 x 250gb drives on a raid card due to heat ( i think , no reports back from manufacturer after failures , just new drives )

Gary MacKenzie

sepulce@hotmail.com ( an account only used for forum messages )

Thinkserver TS140 , 750ti Graphics card  & LG 27" uws led backlight , Edius 8

Humax Foxsat HD Pvr / Humax Fox T2 dvbt

caryjoy
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Joined: May 10 2005

Hey Chaps, great info speedy responses. I will investigate all this tonight & advise. Many thanks

Claire
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Joined: Apr 28 2001
harlequin wrote:
4. the larger ide drives do not like heat ..... i have killed 4x120gb , and 4 x 250gb drives on a raid card due to heat ( i think , no reports back from manufacturer after failures , just new drives )

I just love P180 computer cases for this reason, the hard drives go in the lower chamber where they are sealed off from the rest of the system above. This lower chamber has an internal fan that sucks fresh air in from the case front and blows it over across the drives and out the back of the case.

Claire

harlequin
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Joined: Aug 16 2000
Claire wrote:
I just love P180 computer cases for this reason, the hard drives go in the lower chamber where they are sealed off from the rest of the system above. This lower chamber has an internal fan that sucks fresh air in from the case front and blows it over across the drives and out the back of the case.

claire , mine were in a 4U 19" rack server case , no slouch at cooling it's contents .....

caryjoy : http://harlequin.demon.co.uk/canopus/stormtest.exe ( self extracting zip file )

Gary MacKenzie

sepulce@hotmail.com ( an account only used for forum messages )

Thinkserver TS140 , 750ti Graphics card  & LG 27" uws led backlight , Edius 8

Humax Foxsat HD Pvr / Humax Fox T2 dvbt

caryjoy
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Joined: May 10 2005

Folks the results of carrying out this test are as follows:-
C drive Read 41MBS Write 26MBS
D drive Read 34MBS Write 35MBS
H drive Read 30MBS Write 30MBS
I drive Read 8294KBS Write 14MBS

I think my "I" drive is on its way out? Unless someone can advise if there's a way to improve its performance. I have not defragged the system for over 6 months as I was told you don't have to do this any longer? Can this attribute to it's performance
Thanks

branny
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Joined: Nov 6 2001

Call me old fashioned . . I defrag drives everytime a new edit is used on the drive.
I take it 'I' is the video drive? It would be a good starting point to help this drive hobble along, though by the sound of it Xmas would be the completion date.

Do not follow, I may not lead. Do not lead . . . I may not follow.

Willow
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Joined: Aug 6 2002

Just a couple of thoughts.

You have 4 drives, are they separate or are they 2 (or more) Hard Drives with partitions - ie
Drive 1 - C: + D:
Drive 2 - H: + I:

And how full are they?

caryjoy
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Joined: May 10 2005

Willow, all drives are seperate, 2 are internal (C&D) the other 2 (H&I) are external firewire connections. Capacity on each drive is as follows:-
C- 45% full
D-15% full
H- 35% full
I- 60% full

Willow
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Joined: Aug 6 2002

Cary

This is what I would do - but you don't have to!

1
Swap f/wire connections between EHDs, then swap the cables on the PCs interface card.
(if they are daisy-chained swap) - To check data flow.

2
De-Frag - I admit not a process I do now - actually not since ME - I liked being able to see the progress, I now have a quite few smaller partitions - so not to much data gets cluttered. I also format the drives I used after each project.

D1 - C: O/S + Programs
D1 - D:
D1 - E:
D2 - H:
D2 - I:
D2 - J:
D2 - K:
D2 - L:
D3 - M:
etc

3
Prepare for the worst.

3a
Check the f/wire enclosure doesn't get hot. - has it got a fan does this work? Is it clogged with dust? - get a blower and blow it out. - the drive is probably U/S from being cooked now anyway - so don't rely on it.
I have a big blue Lacie f/wire drive this has a fan. I then got a Lacie "Porsche" f/wire drive - this didn't have a fan.

3b
If above is OK, and you are able to hold a screwdriver, take it apart you will probably find the HD has a IDE interface (as oppossed to SATA) Replace the drive or get new EHD.

Hope that works for you.

caryjoy
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Joined: May 10 2005

Willow, I will have a look at that later thanks