-----Ursprüngliche Nachricht----- Von: Jim Meyering <j...@meyering.net> Gesendet: 18.02.2010 09:31:54 An: Tobias Arp <tobias...@web.de> Betreff: Re: Differences in Primary GPT Header
>Tobias Arp wrote: >> i am using parted 2.1 aand i have some questions about gpt partitions. >> I have created a gpt partion on a harddisk. After creating a ntfs file >> system on this partition i got full access to this drive. >> I could read and write successfully on it. >> I viewed the primary gpt header on my linux computer and printed it. >> Then i put this harddisk on my windows 7 pc. The harddisk is detected >> successfully and i can access all files. >> But after having the drive in my windows computer changes are made to the >> primary gpt header. >> >> Following values aree changed: >> >> Offset 0x20 = Backup LBA >> Offset 0x30 = Last usable LBA >> >> Both are decreased for about 30 sectors. >> Windows does it. > >Thanks for the report. > >> When i look into the documentation of gpt partitions it seems to be right >> what windows has done. > >Why? > I think Offset 0x30 (Last usable LBA) should be the LBA before the Backup Partition Array and not the Last LBA of the Harddisk. Or is this wrong? >Please provide more information, e.g., the output of this: >(assuming your disk is /dev/sda) > > # parted -s /dev/sda u s print free Model: ATA LaCie Biggest Qu (scsi) Disk /dev/sdb: 11721081216s Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 1 34s 11721081182s 11721081149s ntfs Basic data partition > >That will tell us the size in sectors of your disk. > >Then tell us the actual values from your primary table by running this: >(again, assuming /dev/sda) > > # od -w8 -Ad --skip=$((512+32)) -N24 -td8 /dev/sda 0000544 11721081215 0000552 34 0000560 11721081182 0000568 Wje i look into the disk with a disk editor on windows 7 the last usable sector is 11721081152... Hope that helps. Regards Tobias ___________________________________________________________ GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de _______________________________________________ bug-parted mailing list bug-parted@gnu.org http://lists.gnu.org/mailman/listinfo/bug-parted
