Date: Sun, 27 Nov 2011 15:49:46 +0000 (UTC) From: Marius Strobl <marius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r228024 - head/sys/sparc64/sparc64 Message-ID: <201111271549.pARFnkhj045765@svn.freebsd.org>
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Author: marius Date: Sun Nov 27 15:49:46 2011 New Revision: 228024 URL: http://svn.freebsd.org/changeset/base/228024 Log: Update comment. Modified: head/sys/sparc64/sparc64/ata_machdep.c Modified: head/sys/sparc64/sparc64/ata_machdep.c ============================================================================== --- head/sys/sparc64/sparc64/ata_machdep.c Sun Nov 27 15:43:49 2011 (r228023) +++ head/sys/sparc64/sparc64/ata_machdep.c Sun Nov 27 15:49:46 2011 (r228024) @@ -36,14 +36,13 @@ sparc64_ata_disk_firmware_geom_adjust(st { /* - * The Sun disk label only uses 16-bit fields for cylinders, - * heads and sectors so the geometry of large IDE disks has - * to be adjusted. If the disk is > 32GB at 16 heads and 63 - * sectors, the sectors have to be adjusted to 255. If the - * the disk is even > 128GB, additionally adjust the heads - * to 255. - * XXX the OpenSolaris dad(7D) driver limits the mediasize - * to 128GB. + * The VTOC8 disk label only uses 16-bit fields for cylinders, heads + * and sectors so the geometry of large disks has to be adjusted. + * If the disk is > 32GB at 16 heads and 63 sectors, adjust to 255 + * sectors (this matches what the OpenSolaris dad(7D) driver does). + * If the the disk is even > 128GB, additionally adjust the heads to + * 255. This allows disks up to the 2TB limit of the extended VTOC8. + * XXX the OpenSolaris dad(7D) driver limits the mediasize to 128GB. */ if (disk->d_mediasize > (off_t)65535 * 16 * 63 * disk->d_sectorsize) disk->d_fwsectors = 255;
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