Date: Mon, 18 May 2020 15:07:21 +0000 From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 244356] Writing to a USB 3.0 stick is very slow Message-ID: <bug-244356-19105-KYDBB2nGry@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-244356-19105@https.bugs.freebsd.org/bugzilla/> References: <bug-244356-19105@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D244356 --- Comment #53 from Olivier Certner <olivier.freebsd@free.fr> --- (In reply to Sebastien Boisvert from comment #44) Hi S=C3=A9bastien, And first of all, I wanted to say this earlier, maybe now it matters even m= ore: I did not want to hijack your initial bug report in any way, so I hope you don't feel that way. Given your initial reports and my experiments, I thoug= ht that we were seeing the same exact problem (at least, the same symptoms). S= ince then, more testing has given birth to a much more contrasted picture, at le= ast on my side. As said in comment #45, SD_64G and SD_128G seem not to work und= er `usbtest` (the first at all, the second one when writing), so just may be b= ad, and I'm trying to RMA them (initial request sent). The situation for KT_32G seems more complex. Indeed, it reliably passes `usbtest`, *except* when I/O size is set to "Random" (the default), in which case no transfer happens and the stick simply disconnects from the bus. Plus, `iostat` reports a pattern that I find quite weird. If you're OK, I'm proposing you to do some tests w= ith your USB 3 sticks (see below), to dig deeper and know to which extent we are indeed seeing the same behaviors. If you're annoyed by my follow-ups, I will happily open another PR and put information there. So, it would be great if you could run the following tests on your USB 3 sticks, and in particular the two models of Kingston. 1. `usbtest` umass: At least, write only, read only, read+write, with I/O s= ize Random and Increasing. 2. `dd` test (see comment #52), with `iostat -w 1 <stick_device>` running elsewhere (and reporting both outputs). Thanks and sorry again if I bothered you. --=20 You are receiving this mail because: You are the assignee for the bug.=
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