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Author Topic: HD list  (Read 3927 times)

PotRoastMan

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HD list
« on: July 08, 2010, 06:50:28 AM »
I need to pick out a couple drives for a DNS-321.  The d-link list of supported drives in the FAQ does not seem very current.  Is there a more current list somewhere?  I want 1TB at least, and plan on mirroring the drives.

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ECF

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Re: HD list
« Reply #1 on: July 20, 2010, 02:12:09 PM »
All drives except for WD drives using Advanced Formatting Technology should work fine. There are no known reported drives with any issue using the DNS-321 currently.
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Never forget that only dead fish swim with the stream

dth1971

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Re: HD list
« Reply #2 on: July 23, 2010, 08:07:19 AM »
Unfortunately I found this out the hard way.   :-[

I just bought 2 1 TB WD Green Drives using the new formatting.  (4K Sectors)  I can write ~700K/second.  Obviously this is painfully slow as I have 240 gigs currently to transfer.

Any word if there will be a fix?

I'm running Raid 1.

Will setting one of the jumpers on the back of the drive solve the problem?
« Last Edit: July 23, 2010, 08:13:06 AM by dth1971 »
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dth1971

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Re: HD list
« Reply #3 on: July 23, 2010, 08:43:34 AM »
Found this on the WD site:
http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=5655

Linux


Linux as an operating system is a combination of a kernel, user space utilities and customized packaging provided within the "distributions" such as Ubuntu, SuSE and Redhat.


The Linux kernel has had specific support for the alternate sector sizes and offsets used by WD Advanced Format disk drives since version 2.6.31. However, distributions based on Linux 2.6.34, the latest stable version of Linux, will provide the most thorough support. Advanced Format parameters are available in the sysfs file system from this kernel version onwards. Kernel versions older than 2.6.31 will not specifically detect Advanced Format Drives, but with proper alignment the system performance will be maintained. To ensure the best performance, it is important to:

Align partitions to the internal 4KB sector boundaries of the drive.
Make sure that data writes are aligned to 4KB sector boundaries.

Partitions are created by a number of possible utilities under Linux with "fdisk" and "parted" being typical command line tools. Parted is one of the better tools and from version 2.1 onwards it includes support for aligning Advanced Format drives. Fdisk and earlier versions of Parted won't automatically align partitions but can be used manually to set up the correct partition boundaries.



Any idea what Linux Kernel this is running?
  From what I can garner is 2.6.22.7. An update to 2.6.31+ would be nice.
« Last Edit: July 23, 2010, 08:46:39 AM by dth1971 »
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