Date: Tue, 17 Nov 2009 10:50:36 -0500 From: David Jackson <djackson452@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: Lockup problems with USB disks Message-ID: <4B02C64C.3020207@gmail.com> In-Reply-To: <4B02B0AE.3040801@gmail.com> References: <4B02B0AE.3040801@gmail.com>
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I apologise if this was posted more than once, for some reason the emails i sent were not reflected back to me, so i assumed they had not gone through , i checked the archive on the web page and they were there. For some reason some messages are not coming through on my gmail account. David Jackson wrote: > > 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.
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