Ask Question. Asked 12 years, 4 months ago. Active 12 years, 4 months ago. Viewed 39k times. Seems a waste to have all that storage lying around in uneven and relatively small chunks.
I'm using Windows Vista Ultimate 64 bit. Improve this question. Joe Schmoe. Joe Schmoe Joe Schmoe 1, 4 4 gold badges 14 14 silver badges 23 23 bronze badges. Add a comment. Active Oldest Votes. One quote here. And another quote here. Improve this answer. Community Bot 1.
Hey, I thought you wanted to see them as a single drive after you saw them "lying around in uneven and relatively small chunks. However, only Vista Enterprise and Ultimate supports dynamic disks. KovBal KovBal 1, 1 1 gold badge 13 13 silver badges 24 24 bronze badges. At the command line enter, to be honest can't remember if the force options -F is needed :. That should be it, we now have a 32GB RAID-0 disk, in theory "doubling" the systems transfer speed and halving its reliability :.
To get each disks UUID string use the command blkid , as shown in figure 3. Also added some brackets to hold an USB hard disk was thinking about backups and swap disk and like the other case a reset and shutdown button, plus a status LED. These models and final assembled system are shown below:. To test the performance of these disks i. One of the main problems of using this command to measure transfer speeds is that Linux uses Page Caches to accelerate access to these types of non volatile storage i.
To view how memory is currently being used at the command line type: free -ht , as example for this Pi system is shown below:. To compare the speed of these disks with memory a ram drive was also created i. To create this virtual disk the command below is used.
The mount points for all the disks are shown in figure 7. To write and then read a MB block of data to each disk the following scripts were used. The read script first synchronises the disk, writing back buffered data then flushes the cache to ensure data is read from the actual disk. Unsurprisingly the RAM drive is the fastest. The performance of the SDCard was a little strange on writes, ignoring the MBps results, average is around 22MBps for read and writes.
These high values were repeatable, not sure what this shows, would jump to the conclusion of caching, but maybe as this disk also hosts the root directory maybe it could be related to that? The USB drive was perhaps too cheap and cheerful, significantly slower write performance, but it was a branded disk.
The hard disk drive showed good performance, i'm guessing that the faster write performance was due to caching hardware buffers on the external hard disk. Never tried it though. On Linux It's crazy enough it just might work! Add a comment. Active Oldest Votes. I did this a while back. Improve this answer. I still think it is a pretty stupid idea. Probably will play with the notion just for the laughs. Good luck with this! Tim Tim 1, 1 1 gold badge 13 13 silver badges 22 22 bronze badges.
Matias Nino Matias Nino 1, 6 6 gold badges 25 25 silver badges 40 40 bronze badges. Andrew Coleson Andrew Coleson 1 1 silver badge 6 6 bronze badges. Jauder Ho Jauder Ho 5, 2 2 gold badges 17 17 silver badges 17 17 bronze badges.
John Rennie. John Rennie John Rennie 7, 1 1 gold badge 21 21 silver badges 34 34 bronze badges. Dave Dave. On further research, I am thinking about instead using raid 10, 2 of the drives on one usb hub and their mirror counterparts on the other usb hub. Each usb hub will be connected to a ups, and of course the netbook will shutdown properly if it loses power. Can this be considered a long term solution for data? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.
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