01-31-2008 03:28 PM
I know that my flash drive has a lifetime max number of erase cycles. I would like to know how big an earase block is. i.e if I erase or rewrite a 1 gig file, am I using one erase cycle or a bunch of erase cycles. (exactly how many).
01-31-2008 03:51 PM
Due to wear leveling algorithms, bad block marking, bad block management, and other advancements, flash has come a long way in terms of durability. While it is true there is a limited number of read/write cycles (per sector) this is not the way device reliability is calculated anymore.
device reliability is calculated in MTBF (mean time between failure) for flash drives i think it is about 1,000,000 hours MTBF.
Also keep in mind that the larger a flash drive the more bits it has over which to spread wear, so as drives become larger durability is only going to increase.
to answer your question erasing a 1GB file will use one erase cycle per sector of storage used and this wear will be spread across the entire device to increase the life of the drive.