Abstract: Examples described herein relate to method and system for managing write modes of a filesystem, wherein the filesystem is mapped to a thinly-provisioned virtual volume (TPVV) defined using a common-provisioning group (CPG) of a set of physical storage devices. The filesystem may be operated in a read-write mode. A used storage capacity of the CPG may be monitored when the filesystem is operational in the read-write mode. Further, a check may be performed to determine whether the used storage capacity of the CPG has reached a storage fullness threshold value. Accordingly, if it is determined that the used storage capacity of the CPG has reached the storage fullness threshold value, the filesystem may be transitioned to a partial read-only mode from the read-write mode.

Abstract: An embodiment of a data cartridge for interfacing with a data cartridge authorization system is disclosed. The data cartridge includes a drive and a communication interface. The drive is configured to store data, where the data comprises first information a first password and a fingerprint. The drive comprises an authentication feature configured to lock access to at least a portion of the data where a second password presented to the drive doesn't agree with the first password. The communication interface is coupled to the electronic storage medium and configured to communicatively couple to an authorization system.

Abstract: According to the invention, an authorization system for authorizing access to a data cartridge is disclosed. The authorization system includes a code, a data cartridge interface, a fingerprint processor, a password generator, and an authorization engine. The code is obtained from outside the data cartridge. The data cartridge interface is used to read data from the data cartridge, where the data includes first information and a fingerprint. The fingerprint generator generates second information using at least the code. The password generator unlocks the data cartridge using the code and the data. The authorizing engine is coupled to at least one of the password generator or the fingerprint processor. At least some of the data or the second information is compared to authorize the data cartridge.

Abstract: Data are stored on a random-access storage medium. A user set of data is received. The user set of data is mapped to multiple frames. For each frame, error-correction bytes are generated over the data mapped to that frame. In addition, the data mapped to that frame are written to a number of data blocks of that frame and the error-correction bytes generated for that frame are written to a number of error-correction blocks of that frame. At least one of the number of error-correction blocks and the number of data blocks differs among at least some of the frames.