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5

The output of: diff -u <(lynx -dump http://www.seagate.com/www/en-au/products/external/expansion/expansion_portable/) <(lynx -dump http://www.seagate.com/www/en-au/products/external/external-hard-drive/portable-hard-drive/) tells it all: -Seagate® Expansion™ Portable Drives +FreeAgent® GoFlex™ Ultra–portable Drive -A basic drive that goes wherever ...


4

You can reboot under normal conditions... you shouldn't for the reason you plan to, though. Changing the port order (which the HP expander card will do) is risky mid-transformation. Wait for the array transformation and make your changes once everything is settled.


4

I really wouldn't - when I first read your question I thought you meant could you reboot the OS midway through the operation and the answer to that is yes - but I really wouldn't power off the server mid-operation at all sorry, you really could kill the array.


3

If your test restores have been successful, building and restoring to a new array using larger disks should work fine. RAID 5 is not recommended for such large disks. The chance of an unrecoverable read error during rebuild is high. You may wish to consider using RAID 6 or RAID 1+0 across 4 disks. Integrated Intel Matrix RAID is not enterprise-grade and I ...


2

... What? $ foo() { echo $a; } $ a=42 $ echo $(foo) 42


2

This is my opinion (just an opinion): Your bandwidth needs are going to depend on the actual usage patterns for each user so giving you some hard fast rule is not something we'll be able to give you, but here are two approaches you can take to get an idea of how much bandwidth you'll need: The simple approach is to conceptually allocate a particular slice ...


2

You would need to update the u1 size before increasing the filesystem from within the OS. The latter will not "see" the new size until the 3ware controller notify it. The unit capacity expansion in 3ware is called migration. I am certain it works for RAID5 and 6, didn't try it with RAID1. Here is an example of migration command to run: # tw_cli /c0/u1 ...


2

ok this answer appends to grs's answer. so credits do go there for 70% of the answer. Notes: if this answer suits you , GET a backup NOW. if you own a UPS connect it on the pc in question NOW. The following procedure was carried out in linux, on DATA disk arrays. It may need some modifications to work on OS/boot arrays. The following procedure requires ...


2

The system question related to your new hard drive that you installed in Slot 4. If there is existing data on the new disk, you will lose that data only, not any existing data on the other 3 disks. I've done it before without losing any data, the only thing to note is that it takes about a day to complete.


1

Yes and no... Think about this: Your disks will not perform at 6Gbps (unless they're SSDs). So some level of oversubscription is okay when you go to using a SAS expander. A more common scenario is the use of an external JBOD storage enclosure. Those usually have 1 or 2 x 4-lane SAS connectors linking them to the main server. Let's assume 4 x 6Gbps, so ...


1

Maybe your kernel did not receive updates from the controller. Try to update the disks info by typing : partprobe /dev/sdb It will force the kernel to re-read the partition tables and disks properties. Also try : hdparm -z /dev/sdb and/or: sfdisk -R /dev/sdb cause partprobe not always works...


1

Adaptec support just send me a response and on this controller it's not available.


1

NeilBrown (neilb (o) suse.de) answered this by email. The problem is the loopback-devices are too small. 1 MB is too little. If size is changed to 30MB it works: seq 0 50 | parallel dd if=/dev/zero of=l{} bs=30M count=1


1

You should start by reading this article : http://scotgate.org/2006/07/03/growing-a-raid5-array-mdadm/ I suggest you degrade the array that you want to destroy. Add the disk that you freed up to the first array. That should give you enough space to move over all your virtual disk images. Once the sr is empty destroy it, and the raid, and add the remaining 2 ...


1

Try: for /f "tokens=2" %%g in ('tf changeset /noprompt %curr%') do tf diff /noprompt /format:unified /version:C%prev%~C%curr% %%g From HELP FOR: To use the FOR command in a batch program, specify %%variable instead of %variable. Variable names are case sensitive, so %i is different from %I.


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The PERC disc controller allows you to reconfigure a RAID and add a disk. To use the free space from the rebuilded virtual disk you will need to resize/move the current volumes. For this you can use GParted Live.


1

The 3Ware 9650se card has this in its spec-sheet: Online Capacity Expansion and RAID Level Migration That's exactly what you're looking for.


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The Adaptec 3805 specifically states it provides "Online Capacity Expansion" in its 'specifications' tab HERE. This will allow you add more of the same size or larger disks 'live' but I'm not aware of any hardware controller that will will let you somehow grow the array with bigger drives, they usually take a 'smallest common denominator' strategy.


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Order can't be changed without changing source code. You can use eval: eval echo $(foo) man bash: The order of expansions is: brace expansion, tilde expansion, parame‐ ter, variable and arithmetic expansion and command substitution (done in a left-to-right fashion), word splitting, and pathname expansion.



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