Date: Sun, 17 Feb 2008 10:51:51 -0300 From: "Carlos A. M. dos Santos" <unixmania@gmail.com> To: freebsd-stable@freebsd.org Subject: Re: ATA -- erratic behaviour when removing disk Message-ID: <e71790db0802170551s25900783lec1268074adbce67@mail.gmail.com> In-Reply-To: <886021203233140@webmail26.yandex.ru> References: <20080216210736.GA17517@eos.sc1.parodius.com> <886021203233140@webmail26.yandex.ru>
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On Feb 17, 2008 4:25 AM, Andrey V. Elsukov <bu7cher@yandex.ru> wrote: > 17.02.08, 02:08, "Carlos A. M. dos Santos" <unixmania@gmail.com>: > > > > precautions prior to yanking the disk. Upon reinsertion, the system > > > > found the disk and I could continue I/O operations on it as if it had > > > > never been removed. Only reason I'm pointing this out is that it > > > > confirms the issue isn't hardware or with vendor implementation, but > > > > rather specific to the OS. > > > Congratulations to the Linux folks. Or not, since this looks like a > > > very risky behavior. Who warrants you that the *same* disk was plugged > > > back? Blindly continuing to write could easily corrupt the contents of > > > the second drive. > > > > There is no risk. Linux's libata detects it when you inserts a different disk. > > > > You can read some details here: > > http://www.mail-archive.com/linux-ide@vger.kernel.org/msg11742.html Quoting the message you pointed out: "You might lose cached and in-flight data of course, and userspace applications may or may not handle the disappearance of their underlying filesystem with grace and aplomb :)" Perhaps you believe that allowing userland applications to lose data is not risky. I strongly disagree. -- Carlos A. M. dos Santos
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