Date: Tue, 31 Jan 2017 19:20:36 +0300 From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net>, Warren Block <wblock@wonkity.com> Cc: freebsd-hackers@freebsd.org, Slawa Olhovchenkov <slw@zxy.spb.ru> Subject: Re: How to safely remove rest of GTP? Message-ID: <515e709a-5c34-0bc1-bc3b-7cff99f6dd97@yandex.ru> In-Reply-To: <201701311543.v0VFh0Bl044986@pdx.rh.CN85.dnsmgr.net> References: <201701311543.v0VFh0Bl044986@pdx.rh.CN85.dnsmgr.net>
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On 31.01.2017 18:43, Rodney W. Grimes wrote: > ... much deleted ... >> >>> It is impossible to have a corrupted GPT and some >>> other type of partition table in the same time. > > I believe that statement is in error. > dd if=/boot/boot0 of=/dev/ada0 > Would not that lead to this very situation if done > to a GPT parted disk drive? No, it will not lead to this situation. /boot/boot0 is similar to /boot/mbr in the example, and with /dev/ada0 all will behaves like with /dev/md0. >> Maybe when only using FreeBSD and gpart, but I'm pretty sure I've seen >> forum users who have tried some crappy other formatting tool and have >> overwritten the primary GPT with a valid MBR and left the secondary GPT >> untouched. This only becomes obvious when they bring the disk back to a >> FreeBSD system. > > As almost all MBR tools are un aware of GPT so well not do anything to > destroy the secondary GPT, so this is infact very likely to occur. Please, give me some working example, when or where you have a problem, and not some theoretical, based on previous negative experience or memories. -- WBR, Andrey V. Elsukov
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