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Full Discussion: Unix Imaging for Redundancy
Top Forums UNIX for Advanced & Expert Users Unix Imaging for Redundancy Post 7080 by mstevenson on Tuesday 18th of September 2001 01:36:34 PM
Old 09-18-2001
Lightbulb Unix Imaging for Redundancy
I'm trying to come up with an "imaging" type solution (a.k.a. Norton Ghost, Imagecast) with standard unix utils. I'd like to just image one of our FreeBSD servers so I can use the hot swap HD's. If one fails, I could slide in an exact duplicate HD and the server would be back up. I've tried just doing something with dd like: dd if=(hd1) of=(hd2) but it's not going to be that simple. I don't think dd is happy about not having a filesystem on hd2 (it's a blank unused drive). I have had luck with tarring up the whole drive, installing a minimal FreeBSD install on the second drive, renaming the kernel, dropping to single user mode, and then untarring, but that takes away the point of having something quick and ready to deploy.

I've also thought about running two mirrored drives (just like scsi+raid) but in an IDE system. Then having the secondary drive deactivated, but ready to go in case the first one fails. Then just tell the bios (through remote console interface) to boot from the slave drive. Thanks in advance for any ideas.
 

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LEARN ABOUT FREEBSD

vpo

VPO(4)							   BSD Kernel Interfaces Manual 						    VPO(4)

NAME

     vpo -- parallel to SCSI interface driver

SYNOPSIS

     device vpo

     For one or more SCSI busses:
     device scbus

DESCRIPTION

     The vpo driver provide access to parallel port Iomega Zip and Jaz drives.

HARDWARE

     The vpo driver supports the following parallel to SCSI interfaces:

     o	 Adaptec AIC-7110 Parallel to SCSI interface (built-in to Iomega ZIP drives)
     o	 Iomega Jaz Traveller interface
     o	 Iomega MatchMaker SCSI interface (built-in to Iomega ZIP+ drives)

USAGE

     The driver should let you use a printer connected to the drive while transferring data.

     DOS and FreeBSD file systems are supported.  When mounting a DOS file system or formatting a FreeBSD file system, check the slice of the disk
     with the fdisk(8) utility.

     In order to unixify a ZIP disk, put the following in /etc/disktab:

     zip|zip 100:
	     :ty=removable:se#512:nc#96:nt#64:ns#32:
	     :pa#196608:oa#0:ba#4096:fa#512:
	     :pb#196608:ob#0:bb#4096:fb#512:
	     :pc#196608:oc#0:bc#4096:fc#512:

     and use bsdlabel(8).

     If you have trouble with your driver, your parallel chipset may not run properly at the detected mode (NIBBLE, PS2 or EPP).  Tune the ppc(4)
     bootflags to force other modes.

SEE ALSO

     da(4), lpt(4), ppbus(4), ppc(4), scsi(4)

HISTORY

     The vpo manual page first appeared in FreeBSD 3.0.

AUTHORS

     This manual page was written by Nicolas Souchu.

BUGS

     During boot, the driver first tries to detect a classic ZIP, then a ZIP+.	The ZIP+ detection is intrusive and may send erroneous characters
     to your printer if the drive is not connected to your parallel port.

BSD
								 December 14, 2004							       BSD
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