From the lines you past above, this seems to be a CALL TRACE issue, and also there is I/O error detected, so this mostly could be an issue with one of your units.
To prevent data loss it is recommended to shut down the system. Please contact your hard drive vendor for further support.
And in such cases, checking the RAID controller, checking the storage disks, are recommended.
This is likely an issue with the file system on the boot media. You can verify if is the data array or not by checking which unit is being used for your volume group in the webGUI, CONFIGURATION-->Volume manager.
If it is the boot media, run the repair file system command from the console at CNTRL+ALT+X menu.
If this does not help consider re-installing the OS and/or replacing the boot drive.
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Disk /dev/sda: 250.0 GB, 250059350016 bytes
39 heads, 62 sectors/track, 201983 cylinders
Units = cylinders of 2418 * 512 = 1238016 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1616 1953125 c W95 FAT32 (LBA)
===
This is likely an issue with the file system on the boot media. You can verify if is the data array or not by checking which unit is being used for your volume group in the webGUI, CONFIGURATION-->Volume manager.
If it is the boot media, run the repair file system command from the console at CNTRL+ALT+X menu.
If this does not help consider re-installing the OS and/or replacing the boot drive.
===
Disk /dev/sda: 250.0 GB, 250059350016 bytes
39 heads, 62 sectors/track, 201983 cylinders
Units = cylinders of 2418 * 512 = 1238016 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1616 1953125 c W95 FAT32 (LBA)
===