Radified Community Forums - Comparing HDDs

Ian Dunster

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	Re: Comparing HDDs - strange results Reply #45 - Mar 9^th, 2004 at 6:54pm Hi Christer. OK. I'll have a think about it until you do (contact Symantec) and see if I can come up with anything. I must admit it's rather puzzling!! It will probably turn out to be something obvious/simple! Ian 8)
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Christer

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Re: Comparing HDDs - strange results
Reply #46 - Mar 9^th, 2004 at 7:36pm

Well Ian,

Quote:

I must admit it's rather puzzling!!

I had "a grey streak" to my hair when this started developing and I don´t think that the colour has changed in a positive way ...... Shocked

......!

Quote:

It will probably turn out to be something obvious/simple!

I suspect that too but it will be a real challenge to compile a "question" to Symantec Support in a way that makes them understand the problem and at the same time keeping it short.

I will provide a link to this thread, though, just to demonstrate that we have tried our best.

Christer

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If I hear - I forget, If I see - I remember, If I do - I understand

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	Re: Comparing HDDs - strange results Reply #47 - Mar 10^th, 2004 at 6:04am I'd be interested to hear what they say. Stumpy
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Christer

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	Re: Comparing HDDs - strange results Reply #48 - Mar 10^th, 2004 at 6:45am Like the Governor says ...... ...... I´ll be back! Christer
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Re: Comparing HDDs - strange results
Reply #49 - Mar 11^th, 2004 at 7:07am

I did a seach for "slow" in the Symantec Support database and it came up with this (the only document with a bearing on the situation):

http://service1.symantec.com/SUPPORT/ghost.nsf/8f7dc138830563c888256c2200662ecd/...

Well, the -fnu switch didn´t force it to use PIO but Ext Int 13h. I have used any and all combination of switches and I have even managed to crash Ghost ...... Grin

...... !

Christer

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Preston

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	Re: Comparing HDDs - strange results Reply #50 - Mar 11^th, 2004 at 7:38am You have a real head-scratcher there.
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El_Pescador

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Re: Comparing HDDs - strange results
Reply #51 - Mar 11^th, 2004 at 10:53am

When performing a Ghost BackUp of my primary active partition, the rate at which it is performed turns out to be disappointingly slower using an external HDD connected via USB 2.0 as a destination contrasted to the exact same task where a logical drive in the extended partition onboard the same internal HDD is the destination.

Maybe I ought to do some comparisons between the two options shown in the image below.

El Pescador

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	Re: Comparing HDDs - strange results Reply #52 - Mar 11^th, 2004 at 1:04pm I would try changing the preferences but I don´t know if it will work better afterwards. I´ve never used a gizmo like that! Christer
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	Re: Comparing HDDs - strange results Reply #53 - Mar 11^th, 2004 at 3:39pm As I suspected, *Write caching and Safe Removal* are policies restricted to removable HDDs. I am not clear at all as to whether or not a HDD in a mobile rack is categorized the same as external HDDs connected via USB 2.0 or Firewire cables. *El Pescador*
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Ian Dunster

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Re: Comparing HDDs - strange results
Reply #54 - Mar 11^th, 2004 at 4:59pm

It's referring to 'Write Behind'

This means that the data to be written to disk is kept in memory and not actually written when the program reports it has been written, e.g. when something is saved, or the program exitted - the data is written when the system can spare the time - it writes BEHIND (after) the actual program says it has finished writing.

Ian 8)

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Christer

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Re: Comparing HDDs - strange results
Reply #55 - Mar 11^th, 2004 at 6:03pm

Quote:

I am not clear at all as to whether or not a HDD in a mobile rack is categorized the same as external HDDs connected via USB 2.0 or Firewire cables.

My 60GXP is in a mobile rack but the rack is connected as Slave on IDE1 which means that the OS doesn´t know it is removable.

A HDD connected via USB or FW is probably per definition of the ports that are used, considered to be removable.

Christer

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	Re: Comparing HDDs - strange results Reply #56 - Mar 11^th, 2004 at 8:44pm Just checking in to see what's happening with the mystery.
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Christer

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Re: Comparing HDDs - strange results
Reply #57 - Mar 22^nd, 2004 at 5:12am

Hello all,
I´m back from my vacation in Norway and will continue with my query to Symantec Support on my problem.

I have wondered if I´m the only one using the 7K250 and Ghost?

No one has neither commented on having the same drive and the same problem nor commented on having the same drive but not the problem.

Undecided

...... Christer ...... ???

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Christer

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Re: Comparing HDDs - strange results
Reply #58 - Mar 22^nd, 2004 at 6:27am

My query to Symantec Support:

Quote:

I have a problem with differing transfer rates on my hard drives when either creating an Image or checking the integrity. I gave not yet had the reason to restore using an Image.

My hardware setup:

Primary Master – Hitachi Deskstar 7K250 – three partitions
C: NTFS – D: NTFS – E: FAT32

Primary Slave - IBM Deskstar 60GXP – two partitions
F: NTFS – G: FAT32

Secondary Master – Samsung SW-408B
Secondary Slave – Samsung SD-612S

I run ghost.exe from Ghost Boot Disks with CD/DVD support but have also tried a Standard GBD w/o CD/DVD support but the results are the same (identical).

When creating an Image of C: to E: or when checking the integrity of the Image on E:, the operation is 2.5-3 times slower than when creating an Image of C: to G: or when checking the integrity of the Image on G:.

When creating an Image of F: to G: or when checking the integrity of the Image on G:, the operation is 2.5-3 times quicker than when creating an Image of F: to E: or when checking the integrity of the Image on E:.

During the creation of an Image with the target partition on the 60GXP, the rates are approximately 342 MB/sec and the rates during the integrity check are approximately 390 MB/sec.

During the creation of an Image with the target partition on the 7K250, the rates are approximately 136 MB/sec and the rates during the integrity check are approximately 145 MB/sec.

I have tried all combinations of switches (-ffi, -ffx, -fni, -fnx and -fnu) when creating Images and checking the integrity. There is no way to force the 7K250 to use PIO instead of UDMA.

I have benchmarked both hard drives using the utility in AIDA32 and there is no problem with the 7K250. It outperforms the 60GXP in that test.

I tried to copy ghststat.txt but the message became too long.

I would appreciate any advice on how to correct this problem concerning the low rates on the 7K250!

Thanks for Your time,
Christer

I/we should receive a response in 4-5 business days.

Christer

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	Re: Comparing HDDs - strange results Reply #59 - Mar 22^nd, 2004 at 12:54pm How was Norway? I've never been. Land of the Vikings & Norsemen. I think they make Opera, the browser, in Norwway.
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