I guess that depends. As you and Ben rightfully added: Backups. Anything else goes back to MTF and ROI, as defragmenting SSD's has been shown to significantly lessen the life of an SSD.
I dont know if there are any statistics that show if a defragmented drive has a higher data recovery rate than a fragmented one for solid or mechanical drives.. Given the seemingly random nature of failures (although I dont know if there are commonalities for physical placement on disks), I dont know if this could ever really be quantified in a meaningful way. Maybe someone with more technical knowledge of flash-type memory could add something meaningful here. -- Espi On Mon, May 19, 2014 at 1:04 PM, Daniel Wolf <[email protected]> wrote: > Wouldn't a defrag make it easier to reconstruct data in a loss scenario > where you're (geeze I can't think of the name, finding files by structure). > > Inb4backup > > > > Daniel Wolf > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *James Button > *Sent:* Monday, May 19, 2014 2:40 PM > *To:* [email protected] > *Subject:* RE: [NTSysADM] Defrag and SSD's > > > > Remember that a SSD is a cluster of storage cells that the management > program in the SSD maps to the drive image that the OS driver sees. > > > > Defragging the drive from the PC OS does not physically sequence the data > in those cells, it causes the storage management facility on the drive > itself to go through the (to it) arduous process of copying cells of data > to other cells, adjusting the physical to logical map, and then erasing > the data from the cell 'cleared' > > Erasure and writing may possibly take 4 times as long as a read, and > actually reduces the life of the 'erased' data storage cell as well as the > storage used for the physical to logical map. > > > > Defrag originally had a triple benefit: > > > > Avoid head movement delays while disparate parts of the file were read - > > Does not apply to SSD's > > > > Avoid extra reads of the space allocation table required to assemble a > list of the locations of the data on the drive - > > Not particularly relevant on drives with large cache, and systems with > gigabytes of real memory > > > > Collect the FAT directory entries into a single block of storage of the > drive (usually ordered, and clustered with other directory lists) - > > Certainly does not apply under NTFS where all the entries are assembled > as detailed by MS and according to the space available within the MFT, and > the file's creation full name. > > And I have been told that Windows will do some compression/tidy up work on > the MFT as a background task > > > > > > So - I'd say defrag of a SSD is actually more likely to cause the system > to be slower, than to be faster! > > > > But then again, that's only my understanding! > > > > JimB > > > > > > > > > > *From:* [email protected] [ > mailto:[email protected] <[email protected]>] *On > Behalf Of *Micheal Espinola Jr > *Sent:* Monday, May 19, 2014 8:00 PM > *To:* ntsysadm > *Subject:* Re: [NTSysADM] Defrag and SSD's > > > > Its never been a question if fragmentation happens on an SSD. It does. The > question is whether or not its worth de-fragmenting: > > 1. Are you getting a worthwhile performance gain? > 2. Is the effort required deteriorating ROI due to user interference > or shortened MTF in a cost-prohibitive manner? > > > > Everything I have read indicates that it significantly hurts the MTF, and > the performance gain is negligible. ROI of course can vary greatly > depending on what you are doing with the equipment, and what that means to > you fiscally. So, it is possible that defrag'ing an SSD is a worthwhile > investment. > > I would imagine that is something akin to the way [fraudulent] investors > short the stock market by paying for their analytical servers to be > physically closer to the Exchange's servers. Thus gaining micro-seconds of > advantage for every trade. > > > -- > Espi > > > > > > On Mon, May 19, 2014 at 11:42 AM, Dave Lum <[email protected]> wrote: > > Truth, or salesmanship? > http://www.condusiv.com/knowledge-center/videos/videos.aspx?index=13 > > I wonder if the actual productivity increase would more than pay for the > product. > > Dave "skeptical" > > >
