[Midnightbsd-cvs] www [572] trunk/documentation/zfs.html: add an example for dealing with advanced format drives and zfs

[laffer1 at midnightbsd.org]

Revision: 572
          http://svnweb.midnightbsd.org/www/?rev=572
Author:   laffer1
Date:     2014-11-22 13:29:12 -0500 (Sat, 22 Nov 2014)
Log Message:
-----------
add an example for dealing with advanced format drives and zfs

Modified Paths:
--------------
    trunk/documentation/zfs.html

Modified: trunk/documentation/zfs.html
===================================================================
--- trunk/documentation/zfs.html	2014-11-13 02:08:35 UTC (rev 571)
+++ trunk/documentation/zfs.html	2014-11-22 18:29:12 UTC (rev 572)
@@ -151,6 +151,39 @@
 				</code>
 				</p>
 				
+				<h4 id="s1h">Advanced format hard drives (4k sector)</h4>
+				
+				<p>Many 4k sector drives do not report their size properly in a bad attempt
+					at backward compatibility.  ZFS works fine with drives that report
+					properly, but for the rest of them the following workaround is 
+					recommended.
+				</p>
+				<p>
+				<code>
+gpart create -s gpt ada0
+
+# create partitions
+gpart add -a 1m -t mnbsd-zfs -l drive0 ada0
+gpart add -a 1m -t mnbsd-zfs -l drive1 ada1
+ 
+# use gnop to make 4k friendly devices
+gnop create -S 4k gpt/drive0
+gnop create -S 4k gpt/drive1
+
+# make a mirror
+zpool create mpool mirror /dev/gpt/drive0.nop /dev/gpt/drive1.nop
+ 
+# export pool and remove virtual devices
+zpool export mpool
+gnop destroy gpt/drive0.nop
+gnop destroy gpt/drive1.nop
+
+# import and keep labels (via -d flag)
+zpool import -d /dev/gpt mpool
+				</code>
+				</p>
+				
+				
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