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CyberSimian

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Everything posted by CyberSimian

  1. Thank you for posting this. I have been using Drivepool for two months now, with one internal SATA disk and two external USB disks in the pool. I too noticed that the USB disks seemed to be accessed continually. They are Western Digital "My Book" disks, and the disk LED: Flashes rapidly when the disk is being accessed. Remains constant when the disk is spinning but not being accessed. Flashes slowly when the disk is spun down. I noticed that the two USB disks were accessed briefly in unison every 3.5 seconds. After making the change that you suggested and then rebooting (need to "Run as Administrator" to make the change), I am pleased to report that the disks are now no longer accessed every 3.5 seconds -- the LEDs remain constant, or flash slowly. In my experience USB disks don't obey the Windows "spin down" time in the power plan -- the USB disk controller decides for itself when to spin down the disk. My suggestion: if Drivepool can determine that Bitlocker is not in use, Drivepool shouId automatically use the setting that you suggested. If Drivepool cannot determine that Bitlocker is in use, the setting should be made available on the Drivepool "Settings" menu. -- from CyberSimian in the UK
  2. I have never tried "CHKDSK / R" on a 2TB disk before, and I was curious to see how long it would take, and whether it would be successful. Luckily, where I live is not subject to power failures; if there had been one during the 6-day CHKDSK, that might well have resulted in the loss of all of the data. The disk-check program that I have is "DiskCheckUp" version 3. It does display SMART data, but I am not convinced by it. There is one datum that is displayed in red ("Raw read error rate"), but the status displayed for that datum is "OK". I am currently looking at how to re-organise my data, and have been looking as NAS systems. Although they can offer protection against disk failures, they seem to do so by storing data in a proprietary form, so that in an "emergency" it is not possible to remove a disk and connect it directly to a Windows PC. Also, most NAS do not seem to support true low-power states (i.e. hibernation). I want a system that will automatically hibernate if it has not been used for (say) 10-15 minutes, and then wake up in response to a magic packet over the LAN. That is why I have returned to looking at a drive-pool solution implemented on a normal Windows system acting as a server. That gives easy expansion by adding another disk, but every disk can be accessed individually if necessary. -- from CyberSimian in the UK
  3. Recently one of my Western Digital "My Book" external USB disks developed some bad blocks. I noticed this when file copies to the disk continued indefinitely. The Windows System Event Log showed "bad block on drive n". I thought it worth trying "CHKDSK /R" to see if it would recover anything. The disk is a 2TB Western Digital green disk. The disk contained approximately 600 recorded-TV files (movies), and was around 70% full. "CHKDSK /R /V" took just over 6 days to complete (running continuously). 29 files were identified as having bad blocks. 5GB of the disk was identified as bad. I have not yet tried reading any files on this disk, so I do not know whether all files were recovered successfully. I am intending to copy the contents to a new disk. -- from CyberSimian in the UK
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