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Full Discussion: How to have bootable backup?
Top Forums UNIX for Dummies Questions & Answers How to have bootable backup? Post 302078812 by siegfried on Tuesday 4th of July 2006 06:50:57 PM
Old 07-04-2006
How to have bootable backup?
In my present dual boot (Fedora Core 4 & WinXP2003 Server) desktop computer, I have redundant 100GB disk drives.

Every so often I boot fedora core 4 and

telinit 1
cp /dev/sda /dev/sdb

and then I reverse the connections to the drives so I boot from the newly created copy.

I just ordered two NSLU2 NAS controllers and two external 300GB USB drives on sale. I would like have a nightly job perform rsync.

I assume I'll have the option of either plugging the 300GB drives directly into the USB ports in the back of my desktop computer or using the NSLU2 NAS controllers.

With the new drives can I just say "telinit 1; cp /dev/sda /dev/sdc" to create a dual bootable image on my new disk that I can subsequently keep up to date with rsync?

If so, can I do that with the NAS controller or do they have to be plugged into the USB port on the back of desktop computer?

My guess is no. Instead I think I'll have to build new dual boot partitions on the disks.

If I do that, can I subsequently use rsync to keep my spare boot disks up to date?

I assume I'll be able to configure my computer to network boot over the NAS controllers too. I understand that the NAS controllers will have to be on my local network for this to be feasible.

Thanks,
Siegfried
 

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LEARN ABOUT NETBSD

mfi

MFI(4)							   BSD Kernel Interfaces Manual 						    MFI(4)

NAME

     mfi -- LSI Logic & Dell MegaRAID SAS RAID controller

SYNOPSIS

     mfi* at pci? dev ? function ?

DESCRIPTION

     The mfi driver provides support for the MegaRAID SAS family of RAID controllers, including:

	   -   Dell PERC 5/e, PERC 5/i, PERC 6/e, PERC 6/i
	   -   Intel RAID Controller SRCSAS18E, SRCSAS144E
	   -   LSI Logic MegaRAID SAS 8208ELP, MegaRAID SAS 8208XLP, MegaRAID SAS 8300XLP, MegaRAID SAS 8308ELP, MegaRAID SAS 8344ELP, MegaRAID
	       SAS 8408E, MegaRAID SAS 8480E, MegaRAID SAS 8708ELP, MegaRAID SAS 8888ELP, MegaRAID SAS 8880EM2, MegaRAID SAS 9260-8i
	   -   IBM ServeRAID M1015, ServeRAID M5014

     These controllers support RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 50 and RAID 60 using either SAS or SATA II drives.

     Although the controllers are actual RAID controllers, the driver makes them look just like SCSI controllers.  All RAID configuration is done
     through the controllers' BIOSes.

     mfi supports monitoring of the logical disks in the controller through the bioctl(8) and envstat(8) commands.

EVENTS

     The mfi driver is able to send events to powerd(8) if a logical drive in the controller is not online.  The state-changed event will be sent
     to the /etc/powerd/scripts/sensor_drive script when such condition happens.

SEE ALSO

     intro(4), pci(4), scsi(4), sd(4), bioctl(8), envstat(8), powerd(8)

HISTORY

     The mfi driver first appeared in NetBSD 4.0.

BSD
								  March 22, 2012							       BSD
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