On 26.06.2012 16:57, Pawel Jakub Dawidek wrote: > On Tue, Jun 26, 2012 at 04:50:36PM +0400, Andrey V. Elsukov wrote: >> Hi All, >> >> Some time ago i have started reading the code in the sys/boot. >> Especially i'm interested in the partition tables handling. >> I found several problems: >> 1. There are several copies of the same code in the libi386/biosdisk.c >> and common/disk.c, and partially libpc98/biosdisk.c. >> 2. ZFS probing is very slow, because the ZFS code doesn't know how many >> disks and partitions the system has: >> http://www.freebsd.org/cgi/query-pr.cgi?pr=148296 >> http://www.freebsd.org/cgi/query-pr.cgi?pr=161897 >> 3. The GPT support doesn't check CRC and even doesn't know anything >> about the secondary GPT header/table. > > Just a quick note here. At some point when I was adding GPT attributes > to allow for test starts I greatly improved, at least parts of, the GPT > implementation. I did implement support for both CRC checksum > verification and fallback to backup GPT header when primary is broken. > And the code is still in sys/boot/common/gpt.c. So my question would be > what do you mean by this sentence? Yes, gptboot does that, but the loader/zfsloader doesn't. So there might be a situation when gptboot does boot, but loader(8) can't. -- WBR, Andrey V. Elsukov
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