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- To: misc_(_at_)_openbsd_(_dot_)_org
- Subject: USB2 status?
- From: Rene Rivera <grafik_(_dot_)_list_(_at_)_redshift-software_(_dot_)_com>
- Date: Mon, 11 Jul 2005 21:57:00 -0500
- Organization: Redshift Software, Inc.
I'm considering implementing a disk based backup system using USB2
hot-swap bays. I'm wondering about the stability and overall hardware
support of the current USB2 drivers (on an x86 box). I'm asking because
the man pages are somewhat slim and a bit scary in talking about USB2.
For example ehci(4) says in the BUGS section "The driver is not finished
and is quite buggy."
Some basic questions I'd love to have an answer to... Of course if the
answer to the first one below is "no real support i.e. alpha" then the
rest are somewhat mute :-)
* Is USB2 support considered experimental, alpha, beta, rc, or release?
* Do others have such a system in use? And how is it working out?
* Has anyone done throughput measurements? How close to the 480Mbds
theory is practice?
* Are there specific hardware choices that I should make? Specifically
for PCI-USB adapters as I'll be purchasing a dedicated card.
* Are hot-swap bays supported in any form? Of course with the usual
unmount caveat ;-)
From the archives I gather there is some support for USB2 and external
HDDs. And I know to stay away from Prolific based USB, re:
http://thread.gmane.org/gmane.os.openbsd.misc/84162 -- I'm just looking
for some more specifics about reliability and effectiveness.
Thanks in advance for any info.
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