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28

There is an old but proven way: Use an old analog modem. Here is how Connect the modem to the server via serial port (e.g. ttyS0) Plug the modem's power supply not into the UPS, but directly in the mains Do NOT plug anything into the modem's phone line Now poll the modem every few seconds sending ATZ[Enter] and expect OK[Enter] - if the modem does not ...


20

A ups usually comes with an USB or COM1 connector. When you connect this to your server you can then start monitoring the UPS. In a windows environment, without installing the software, the messages are already registered, and it will shut down the server for you. I don't know how this works on linux, but I bet there are some software packages available to ...


3

The disk is not a "spare". It's used for parity information. The data between all other drives is run through an XOR computation, the result of which is stored on the parity drive. Due to the nature of XOR, if any of the drives that were used in the computation are lost, the information can be restored from the information on all other drives. XOR stands ...


3

FreeFileSync (http://sourceforge.net/projects/freefilesync/). Faster than Sync Toy. Open source. Updated frequently. Has an associated utility that constantly checks for updates to one hard disk (or directory) and mirrors those changes to the other. (Yes, I know I'm answering a three year old thread, FFS was around then, and was a superior choice then, and ...


3

Hmmm. 4 drives in raid 5, access over gige. Max transfer rate for a NAS is the slowest of the disk array or the network. Since the disk array in theory could provide 3 x the HD speed, looks like the network will be the limiting factor. Unless of course, the software raid slows every thing down by more than a factor of 3. Theory: Each 3TB WD stat drive ...


2

I cant answer with 100% certainty, however you should not lose any data. Worst case, switching from RAID to AHCI would cause the drive to be unable to be read. If this were to happen, you could switch it back and everything should be copasetic. However, this is not likely to be the case. The controller should just pick up the disk as a single drive and ...


2

Windows does not like to mix drive sizes with raid. You could put the first three in raid 5 (2.7*2 for total storage ) You could put the second three in raid 5 (0.9*2 for total storage ) and 'binning'="in american English 'throw away' " the 7th. This leaves less total storage then you are currently using, so you would have to throw stuff away. That's ...


1

Windows have disabled the RAID drivers because you were using AHCI. You need to reenable them. Check this link http://www.overclock.net/t/1227636/how-to-change-sata-modes-after-windows-installation No reinstall is necessary.


1

Just solved this "issue" using an alternative method. I have a Gigabyte 990-FXA-UD3 motherboard with a AMD SB950 southbridge. My motherboard has 6 SATA ports. One of the options in the bios was to set the mode of SATA port 4/5 to "SAME as 0-3" or "IDE mode." What I did was enabled RAID on ports 0-3, but set PORTS 4-5 into IDE mode. I moved my OS drive from ...


1

How to enable RAID AFTER having installed Win OS (This works in Win 7 and 8) Use run command (Winkey+r) and type "msconfig", hit enter. Under the second tab "Boot", check "Safe boot" under boot options, use "Minimal" sub-option. Click OK and reboot. At reboot enter bios and change controller to RAID, safe bios and reboot. Windows will now boot up in "Safe ...


1

Yes. However, if you set up a RAID 5 (hardware or not) using 4x 3TB disks, you're setting yourself up for a fall, because of the probability of Unrecoverable Read Errors when rebuilding the array when a disk fails. RAID 6 is your only sensible option here. Well, actually you could use RAID 10/0+1 or ZFS, but YMMV, y'know.


1

It is possible, and it's called software RAID. Follow: http://www.howtogeek.com/howto/36504/how-to-create-a-software-raid-array-in-windows-7/ Under *nix machines learn about LVM.



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