diff options
Diffstat (limited to 'sbin/recoverdisk')
| -rw-r--r-- | sbin/recoverdisk/recoverdisk.1 | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/sbin/recoverdisk/recoverdisk.1 b/sbin/recoverdisk/recoverdisk.1 index 9eff8f7..044b801 100644 --- a/sbin/recoverdisk/recoverdisk.1 +++ b/sbin/recoverdisk/recoverdisk.1 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd May 1, 2011 +.Dd Jan 5, 2012 .Dt RECOVERDISK 1 .Os .Sh NAME @@ -124,7 +124,11 @@ recoverdisk -b 0 /dev/ad3 /somewhere .Ed .Sh SEE ALSO -.Xr dd 1 +.Xr dd 1 , +.Xr ada 4, +.Xr cam 4, +.Xr cd 4, +.Xr da 4 .Sh HISTORY The .Nm @@ -149,6 +153,18 @@ flying by. This is harmless and can be avoided by setting .Fl b to no more than 128kB. +.Pp +.Nm +needs to know about read errors as fast as possible, i.e. retries by lower +layers will usually slow down the operation. +When using +.Xr cam 4 +attached drives, you may want to set kern.cam.XX.retry_count to zero, e.g.: +.Bd -literal +# sysctl kern.cam.ada.retry_count=0 +# sysctl kern.cam.cd.retry_count=0 +# sysctl kern.cam.da.retry_count=0 +.Ed .\".Pp .\"When reading from optical media, a bug in the GEOM framework will .\"prevent it from seeing that the media has been removed. |
