RAID without TLER

[D. Hugh Redelmeier]

This old article
<http://www.smallnetbuilder.com/nas/nas-features/31202-should-you-use-tler-drives-in-your-raid-nas>
claims that TLER (Time Limited Error Recovery) is not needed for disks in 
some home RAID systems.

You can read some forum posts too.

One mistake in the article:
	their NAS RAID controllers don't depend on or even listen to
	TLER, CCTL, ERC or any other similar error recovery signal
	from their drives.
As I undertand it, there isn't a TLER signal.  TLER just puts a bound
on how long a disk drive will take before responding to a read
request.

Here's another thread that seems to confirm that Linux software RAID 
handles disks without TLER.

<http://forums.storagereview.com/index.php/topic/29208-how-to-use-desktop-drives-in-raid-without-tlererccctl/>

Just much more patience is needed in the RAID system when waiting for
a result from a disk?
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