With the use of increasingly sophisticated encryption systems, an attacker wishing to gain access to sensitive data is forced to look elsewhere for information. One avenue of attack is the recovery of supposedly erased data from magnetic media or random-access memory. This paper covers some of the methods available to recover erased data and presents schemes to make this recovery significantly ...

The dream of replacing rotating mechanical storage, the disk drive, with solid-state, nonvolatile RAM may become a reality in the near future. Approximately ten new technologies—collectively called storage-class memory (SCM)—are currently under development and promise to be fast, inexpensive, and power efficient. Using SCM as a disk drive replacement, storage system products will have random an...

We show that a rotation in three dimensions can be achieved by a composition of three shears, the rst and third along a speciied axis and the second along another given axis orthogonal to the rst; this process is invertible. The resulting rotation algorithm is practical for the processing of ne-grained digital images, and is well adapted to the access constraints of common storage media such as...

In the arsenal of resources for improving computer memory system performance, predictors have gained an increasing role in the past few years. They can suppress the latencies when accessing cache or main memory. In our previous work we proposed predictors that not only close the opened DRAM row but also predict the next row to be opened, hence the name ‘Complete Predictor’. It requires less tha...

Magnetic RAM (MRAM) is a new memory technology with access and cost characteristics comparable to those of conventional dynamic RAM (DRAM) and the non-volatility of magnetic media such as disk. Simply replacing DRAM with MRAM will make main memory non-volatile, but it will not improve file system performance. However, effective use of MRAM in a file system has the potential to significantly imp...

Modern computer systems rely extensively on dynamic random-access memory (DRAM) to bridge the performance gap between on-chip cache and secondary storage. However, continuous process scaling has exposed DRAM to high off-state leakage and excessive power consumption from frequent refresh operations. Spintransfer torque magnetoresistive RAM (STT-MRAM) is a plausible replacement for DRAM, given it...

File systems and databases usually make several synchronous disk write accesses in order to make sure that the disk always has a consistent view of their data so that it can be recovered in the case of a system crash Since synchronous disk operations are slow some systems choose to employ asynchronous disk write operations at the cost of low reliability in case of a system crash all data that h...

Thangamani.V Kalaignar Karunanidhi Institute of Technology, Chennai Anna University, Kannampalayam(PO),Coimbatore-641402,TamilNadu,India. Contact No.:8675802322, E-mail: [email protected] Abstract The computer memory system has both volatile and non volatile memory. The Volatile memories such as SRAM and DRAM used as a main memory and non volatile memory like flash memory. But in recent days...