Date: Tue, 17 Nov 2009 14:36:03 -0500 From: David Jackson <djackson452@gmail.com> To: Maciej Milewski <milu@dat.pl>, freebsd-questions@freebsd.org Subject: Re: Lockup problems with USB disks Message-ID: <4B02FB23.3060109@gmail.com> In-Reply-To: <200911171712.18850.milu@dat.pl> References: <4B02B0AE.3040801@gmail.com> <200911171712.18850.milu@dat.pl>
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Thank you. I took a look. I was just wondering if this was a known bug, is it normal, etc. Maciej Milewski wrote: > Dnia wtorek 17 listopad 2009 o 15:18:22 David Jackson napisał(a): > >> I have a USB hard drive. Whenever I open two programs which utilise the >> USB hard drive simultaneously, these programs, i assume when they >> attempt to write to the hard drive lock up due to what i suspect must be >> some issue with the USB driver and perhaps a deadlock involving multiple >> concurrent accesses to the drive. When they attempt to access the drive >> the programs can lock up for several minutes before being unblocked. >> When only one program is using the drive this behaviour does not seem to >> occur. >> >> It seems most likely that this is a USB level problem involving the USB >> drivers. I am using FreeBSD 7.1. It is annoying behaviour to say the >> least and I wonder what can be done about it, and if this issue is being >> addressed, perhaps in the recent redesign of the USB code. It seems to >> be a pretty consistent issue, happening with multiple installs of >> FreeBSD and different drives. >> >> Thank you. >> > I forgot to attach a link with information about this new stack. Some you can > find at http://ivoras.sharanet.org/freebsd/freebsd8.html > >
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