" This is the latest version of SoftRAID and includes:

• Full compatibility with Mac OS X 10.11 El Capitan
• RAID 4, RAID 5 and RAID 1+0 volumes
  ('Lite' version supports RAID 0, RAID 1 only)
• High resolution graphics for Macs with Retina Displays
• SoftRAID Monitor now displays disk and volume status in menu bar
• Improved performance and reliability

System Requirements:
SoftRAID requires Mac OS X 10.6.8 or later. Support for TRIM commands on SSDs requires 10.7.5 or later. SoftRAID requires a Mac which contains a Core 2 Duo or later processor. It will not work on early Intel Macs with Core Duo processors.

See revised SoftRAID D/L page for full vs lite version features comparison.

SoftRAID 5.1 Release Notes (Full Version)
The following info is from the Release Notes in the Softraid 5.1 DMG download:

Known Bugs:
• There is a bug in Parallels software (version 10) which can cause data corruption in your Windows virtual machines. We do not recommend using Parallels at this time.
• The function in the SoftRAID application which allows converting volumes from one format to another is not yet implemented.
  
  New features in version 5.1:
• This version is fully compatible with Mac OS X 10.11 El Capitan.
• The SoftRAID application now indicates if a disk has TRIM enabled.
• The driver now uses only the primary disks for reading from mirror (RAID 1) and RAID 1+0 volumes if the primary disks are SSDs and some of the secondary disks are HDDs. This results in higher read performance with these volumes.
• You can now resize a SoftRAID volume even if there are other volumes on the same set of disks.
  
  Bugs fixed in version 5.1:
• Fixed a bug that could cause data corruption on RAID 4 and RAID 5 volumes which contain 2 or more unreliable disks.
• Fixed a bug in the SoftRAID driver that could cause data corruption when validating out of sync RAID 4 and RAID 5 volumes.
• Fixed a bug in the SoftRAID application that could cause the application to hang when it was quit. This could happen for instance after a disk was removed from the Mac when SoftRAID was blinking its disk light.
• Added a workaround for a bug in Mac OS X that prevents some volumes from being unmounted.
• Fixed a bug in the SoftRAID driver that caused changes to the list of primary disks for a RAID 1+0 volume to not take effect until after a restart.
• Fixed a bug in the SoftRAID driver that could cause the SoftRAID application to hang if a disk was removed from a volume when it was rebuilding.
• Fixed several bugs that affected how SoftRAID handled volumes that fail during validation due to a read or write error. SoftRAID now displays "validate failed" in the volume tile and adds an entry for the error in the SoftRAID.log file.
• Fixed a bug in the SoftRAID application that prevented it from resuming a disk zero, verify or certify operation if the SoftRAID application crashed or was force quit. The new code saves the current position every 60 seconds so that an operation can be resumed.
• Changed the disk certification code so that errors written to the log now include the pass number.
• Fixed a bug that caused duplicate log entries of errors during disk certification.
• Fixed several bugs in the SoftRAID application that affected adding or removing more than one disk from a volume simultaneously.
• Fixed several bugs that affected rebuilding and validating read-only SoftRAID volumes.
• Fixed a bug in SoftRAID that could result in the maximum volume size being incorrect in the volume resize window.
• Fixed a bug that could cause the SoftRAID application to fail if a user tried to resize a volume and a disk was spun down.
• Fixed a bug that could cause the resume operation dialog to appear if a user performed a zero disk, verify disk or certify disk twice in a row.
• Fixed a bug in the SoftRAID Tool that prevented volumes from being validated when the validation was started from the command line.
• Fixed a bug that could cause the SoftRAID application to use up all the free space on a disk when adding the disk to a small volume

  
  

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