At 04:22 PM 21/07/2005, Karl Denninger wrote:
ATA-NG (Soren's new code) is not (from what I understand) in the 5.x
codebase.
No, but its quite different from what was in 4.x.
My understanding is that the 5.x code is a half-baked version of ATA-NG,
and IMHO it had no business going into a PRODUCTION release in the state
that it was pushed over.
It works quite well for many people. It might be just half-baked for the
controller you are using. Or perhaps the controller chipset is just half
baked.
Looks at some of the comments in the LINUX driver for example
* After the IDENTIFY [PACKET] DEVICE step is complete, and a
* device is known to be present, this function is called.
* We apply two errata fixups which are specific to Silicon Image,
* a Seagate and a Maxtor fixup.
*
* For certain Seagate devices, we must limit the maximum sectors
* to under 8K.
*
* For certain Maxtor devices, we must not program the drive
* beyond udma5.
*
* Both fixups are unfairly pessimistic. As soon as I get more
* information on these errata, I will create a more exhaustive
* list, and apply the fixups to only the specific
* devices/hosts/firmwares that need it.
*
* 20040111 - Seagate drives affected by the Mod15Write bug are
blacklisted
* The Maxtor quirk is in the blacklist, but I'm keeping the original
* pessimistic fix for the following reasons...
* - There seems to be less info on it, only one device gleaned off the
* Windows driver, maybe only one is affected. More info would be
greatly
* appreciated.
Given that we were all "strongly" encouraged to upgrade to 5.x for production
machines a few months ago it was a truly ugly surprise to find that current
production hardware which ran just fine on 4.x was hosed to the point of
unusability with 5.x as a consequence of serious (some would say CRITICAL)
driver issues.
Why not stick with 4.x if it works for you. When you see that your
particular device driver gets fixed then try it out on a test machine. It
might never, it might next month. This is open source remember. If its
very critical to use this particular bit of hardware, see if Soren has this
hardware to even test on. You like the cards, why not send him one. He
might be interested in fixing it when he has an actual card to test with.
---Mike
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