Airdisk - SLOW read speed, but FAST write speed with Leopard 10.5.1?

I've been complaining for a while about my random problems with reading files from airdisk. My solution has always been to relaunch finder and re-mount the airdisk when it slows down.
I just noticed the speed cut down to and when looking at the activity monitor, it's fluctuating up and down and never seems to go past 1.5 to 2 MB/s.
HOWEVER, what I did just notice is that my write speed is consistently 3-4 MB/s with no fluctuation at all. Interference is not an issue, as I'm on N-only mode and in 5GHZ.
Is there anything I can do aside from waiting until 10.5.2? This does this issue in every AEBSn firmware. Thanks.

I experience the same problem (slow read: 2,8 MB/s, fast write: 6,3 MB/s) with my airdisk over a LAN-connection with 10.5.2. I atteched the USB-drive directly to my iMac and then it's the other way around: fast write, slow read (although considerably higher and normal throughtputs so drive is OK).
Anyone having some suggestions? The airdisk is formatted as HFS+ (GUID) with journalling on, Airport firmware 7.3.1 and the most recent updates installed.
Message was edited by: jnmen

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Airdisk: slow read, fast write?

I'm evaluating the option to use the Airdisk as an alternative for my Linux fileserver. For this I created 2 partitions (Airdisk1 and Airdisk2, both Mac OS Extended Journalled GUID) on a USB-drive using the disk utility. Then I attached this drive to my AEBS.
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Write the file to Airdisk1: 6.3 MB/s (not (Mb/s)
Read the file from Airdisk1: 2.8 MB/s (not Mb/s)
The strange thing is that the read-speads are considerably lower than the write speeds. Also, while the write-speed is consistent during the copy, the read-speed is very mixed and sometimes it even stops for a split-second. Can anybody explain this to me how this is possible? When attaching the USB-drive directly to the iMac, both read and write are equal and at a very high level (so no problem with the iMac-disc).
Also, are these speeds more or less the maximum I can expect?
Is GUID the right choice or is it better to use APM (Apple Partition Map)?
The AEBS is using firmware 7.3.1 and all the latest software updates are done.
Thanks for any reponse.
Message was edited by: jnmen
Message was edited by: jnmen

Thanks for your support.
I looked at the post you're referring to and disabling journaling only improved the write-speed. But the write-speed is not what the problem is; it is the read-speed. And disabling journaling has no influence on reading a drive (as far as I know).
Also, disabling journaling can give data integrity-problems on the HD in case of sudden disconnects or power-down. Or am I wrong?

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Has anyone else seen Windows Server 2012 Storage Spaces with a Simple RAID 0 (also happens with Mirrored RAID 1 and Parity RAID 5) virtual disk exhibiting extremely slow read speed of 5Mb/sec, yet write performance is normal at 650Mb/sec in RAID 0?
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The Enterprise drives are on LSI's compatibility list. The Desktop drives are not, but regardless, both drive models are affected by the problem.
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I thought SAS was going to be a sure bet for expanding beyond the capacity of port limited eSATA adapters, but after a week of frustration and spending over $5,000.00 on drives, controllers and cabling, it's time to ask for help!
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1) Yes, being slow either on reads or on writes is a quite common situation for storage spaces. See references (with some of the solutions I hope):
http://social.technet.microsoft.com/Forums/en-US/winserverfiles/thread/a58f8fce-de45-4032-a3ef-f825ee39b96e/
http://blogs.technet.com/b/askpfeplat/archive/2012/10/10/windows-server-2012-storage-spaces-is-it-for-you-could-be.aspx
http://social.technet.microsoft.com/Forums/en-US/winserver8gen/thread/64aff15f-2e34-40c6-a873-2e0da5a355d2/
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http://helgeklein.com/blog/2012/03/windows-8-storage-spaces-bugs-and-design-flaws/
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http://social.technet.microsoft.com/Forums/en-US/winserverClustering/thread/5d4f68b7-5fc4-4a3c-8232-a2a68bf3e6d2
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Message was edited by: Hey Cricket
Message was edited by: Hey Cricket

Chr!x wrote:
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MVP - Directory Services
MCITP: Enterprise Administrator
MCTS, MCT, MCSE, MCSA, Security, BS CSci
2012, 2008, Vista, 2003, 2000 (Early Achiever), NT4
Twitter @pbbergs http://blogs.dirteam.com/blogs/paulbergson
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Airdisk - SLOW read speed, but FAST write speed with Leopard 10.5.1?

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