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Questions[flash-drive](server)

Martin Hope
ShankarG
Asked: 2012-05-24 02:03:20 +0800 CST
  • 4

I am running a web server off of a SheevaPlug, and the OS and system are stored on an SD card with an ext3 file system. I know that atime is a major source of writes that wear out flash memory.

This question recommends using the relatime mount option over the noatime one, but it isn't clear if that holds true with flash memory too (where total number of writes is also a concern). This much cited blog on kerneltrap as well as this other question imply that using the noatime option does not produce any problems, in which case it seems preferable.

So would it be better to use noatime and avoid atime writes entirely, or to use relatime to avoid any software problems?

filesystems ext3 flash-drive compact-flash
Martin Hope
purplemonkeydishwasher
Asked: 2011-01-27 19:33:27 +0800 CST
  • 2

As a reference:

  • Crucial RealSSD C300 256GB drives.
  • MySQL 5.1.5x running InnoDB tables.
  • Linux (CentOS 5.5 etx3 journaled).

Questions:

  1. Is it better to use a RAID of these so that drives can be swapped in and out or get a FusionIO or RevoDrive card?

  2. If RAID, what controller? LSI? 3Ware?

  3. What layout? I would presume the RAID 5 hole doesn't apply as much to SSD since the rebuild time is much less. Bad assumption?

  4. If a flash card, what card?

  5. Better to move to Solaris and ZFS and skip the cards and pick up other goodies along with? I have only experience with Linux so the move to Solaris would be uncomfortable though doable.

mysql solaris raid ssd flash-drive
Martin Hope
kolypto
Asked: 2009-07-23 13:14:23 +0800 CST
  • 0

I have a USB Hard Drive

In Windows, i used to click the "Safely remove" icon, and the hdd stopped spinning and was unmounted.

Now, in Linux, unmounting doesn't poweroff the device, and it proceeds spinning when i remove it's cable. Is there a way to poweroff the HDD?

Additionally, I'd like to teach the KDE's "Device notifier" plasmoid to do this :)

hard-drive linux usb flash-drive
Martin Hope
Dani
Asked: 2009-05-02 05:59:14 +0800 CST
  • 1

I am considering to avoid purchase new machines with optical drives. The only caveat is the OS installation which can be messy - to open the case and temporarily hook up DVD which often does not worth the trouble comparing to the price of a drive.

Has anyone tried to install an os from thumb drive? What are the pitfalls? Which tools/guides did you use?

Please also mention the hardware(motherboard etc.) you used

installation operating-system flash-drive