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Date:      Thu, 24 Dec 2009 21:39:31 +0000 (UTC)
From:      Alexander Motin <mav@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r200968 - head/usr.sbin/diskinfo
Message-ID:  <200912242139.nBOLdV5P042035@svn.freebsd.org>
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Author: mav
Date: Thu Dec 24 21:39:30 2009
New Revision: 200968
URL: http://svn.freebsd.org/changeset/base/200968

Log:
  Make diskinfo report disk stripe size and offset. It should help users to
  make file systems optimally aligned and tuned for better performance.

Modified:
  head/usr.sbin/diskinfo/diskinfo.8
  head/usr.sbin/diskinfo/diskinfo.c

Modified: head/usr.sbin/diskinfo/diskinfo.8
==============================================================================
--- head/usr.sbin/diskinfo/diskinfo.8	Thu Dec 24 20:55:14 2009	(r200967)
+++ head/usr.sbin/diskinfo/diskinfo.8	Thu Dec 24 21:39:30 2009	(r200968)
@@ -46,7 +46,8 @@ and optionally runs a naive performance 
 .Pp
 If given no arguments, the output will be a single line per specified device
 with the following fields: device name, sectorsize, media size in bytes,
-media size in sectors, firmware cylinders, firmware heads, and firmware sectors.
+media size in sectors, stripe size, stripe offset, firmware cylinders,
+firmware heads, and firmware sectors.
 The last three fields are only present if the information is available.
 .Pp
 If given the

Modified: head/usr.sbin/diskinfo/diskinfo.c
==============================================================================
--- head/usr.sbin/diskinfo/diskinfo.c	Thu Dec 24 20:55:14 2009	(r200967)
+++ head/usr.sbin/diskinfo/diskinfo.c	Thu Dec 24 21:39:30 2009	(r200968)
@@ -58,7 +58,7 @@ main(int argc, char **argv)
 {
 	int i, ch, fd, error;
 	char buf[BUFSIZ], ident[DISK_IDENT_SIZE];
-	off_t	mediasize;
+	off_t	mediasize, stripesize, stripeoffset;
 	u_int	sectorsize, fwsectors, fwheads;
 
 	while ((ch = getopt(argc, argv, "ctv")) != -1) {
@@ -104,11 +104,19 @@ main(int argc, char **argv)
 		error = ioctl(fd, DIOCGFWHEADS, &fwheads);
 		if (error)
 			fwheads = 0;
+		error = ioctl(fd, DIOCGSTRIPESIZE, &stripesize);
+		if (error)
+			stripesize = 0;
+		error = ioctl(fd, DIOCGSTRIPEOFFSET, &stripeoffset);
+		if (error)
+			stripeoffset = 0;
 		if (!opt_v) {
 			printf("%s", argv[i]);
 			printf("\t%u", sectorsize);
 			printf("\t%jd", (intmax_t)mediasize);
 			printf("\t%jd", (intmax_t)mediasize/sectorsize);
+			printf("\t%jd", (intmax_t)stripesize);
+			printf("\t%jd", (intmax_t)stripeoffset);
 			if (fwsectors != 0 && fwheads != 0) {
 				printf("\t%jd", (intmax_t)mediasize /
 				    (fwsectors * fwheads * sectorsize));
@@ -124,6 +132,8 @@ main(int argc, char **argv)
 			    (intmax_t)mediasize, buf);
 			printf("\t%-12jd\t# mediasize in sectors\n",
 			    (intmax_t)mediasize/sectorsize);
+			printf("\t%-12jd\t# stripesize\n", stripesize);
+			printf("\t%-12jd\t# stripeoffset\n", stripeoffset);
 			if (fwsectors != 0 && fwheads != 0) {
 				printf("\t%-12jd\t# Cylinders according to firmware.\n", (intmax_t)mediasize /
 				    (fwsectors * fwheads * sectorsize));

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