Date: Sun, 08 Dec 2019 17:11:51 +0000 From: bugzilla-noreply@freebsd.org To: geom@FreeBSD.org Subject: [Bug 242341] GEOM / GEOM_PART: silent discard MBR modification Message-ID: <bug-242341-14739-kwlMX5kSGK@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-242341-14739@https.bugs.freebsd.org/bugzilla/> References: <bug-242341-14739@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242341 --- Comment #3 from Tomasz "CeDeROM" CEDRO <tomek@cedro.info> --- Hello Andrew! :-) Thank you for your reply. There is a discussion on a mailing lists (questions andusb), where some folks say this is the pendrive problem, others suggest that invalid MBR may be the reason of discarding writes to MBR. I think here is the best place to ask questions and solve the issue directly with authors :-) 1. I would like to clarify why I was unable to write to MBR (first 512 bytes) of the da1 while there was no problem with writhing to the rest of the disk? 2. GEOM_PART: integrity check failed (da1, MBR) <- could that block / discard writes to MBR silently? 3. Why `dd if=/dev/da0 of=/dev/da1` did copy all disk except the MBR? 4. Why I was unable to write to MBR from a file but it was possible to write that data from a file over md0? This is the first time such situation happened to me in FreeBSD for many many years. I am working a lot on disk copies / images so reliable and trustworthy DD is a must have for me.. -- You are receiving this mail because: You are the assignee for the bug.
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