Personal computing discussed
Moderators: renee, morphine, Steel
The Egg wrote:Did you also let Magician disable Prefetch and Superfetch? I don't think 0.08TB is cause for panic just yet. You've got a fresh install of Windows and you're still installing stuff. I'd wait until after things have settled down a bit and see what happens. It could also be something like CCleaner constantly wiping all your cache files (only to have them rewritten the next time you use the program). I personally don't like those stupid "cleaner" utilities. Anything that mentions the windows registry is a snake oil program. I don't think I've seen a "registry error" since Windows 95.
Microsoft wrote:In looking at telemetry data from thousands of traces and focusing on pagefile reads and writes, we find that
•Pagefile.sys reads outnumber pagefile.sys writes by about 40 to 1,
•Pagefile.sys read sizes are typically quite small, with 67% less than or equal to 4 KB, and 88% less than 16 KB.
•Pagefile.sys writes are relatively large, with 62% greater than or equal to 128 KB and 45% being exactly 1 MB in size.
ronch wrote:Hmm... so even if I write just a few hundred kilobytes, the SSD writes an entire 2MB block? Unless I'm writing data that's large enough to fill entire 2MB blocks and not waste much of a 2MB write, I'll end up using my 'write headroom' far more quickly, wouldn't I? Is this right?
just brew it! wrote:SATA protocol is inherently sector-based; there isn't a "modify one byte in a specified sector" command. Flash also cannot rewrite an individual byte in place; the sector must be erased first.
just brew it! wrote:As noted above, I am not sure whether Magician is measuring the amount of data written by the host, or the amount of data written to the flash array (after write amplification).
ID # 241 Total LBAs Written
Represents the total size of all LBAs (Logical Block Address) required for all of the write requests sent to the SSD from the OS. To calculate the total size (in Bytes), multiply the raw value of this attribute by 512B. Alternatively, users may simply consult the Total Bytes Written indicator in Magician 4.0.
Orwell wrote:just brew it! wrote:As noted above, I am not sure whether Magician is measuring the amount of data written by the host, or the amount of data written to the flash array (after write amplification).
According to Samsung, the 0xF1 or 241st attribute in SMART of the 830/840 series stores the amount of sectors the SSD had to erase in order to perform the requests sent by the OS. This SMART attribute is exactly what SSD Magician shows in its GUI.
Orwell wrote:http://www.samsung.com/global/business/semiconductor/minisite/SSD/global/html/about/whitepaper07.htmlID # 241 Total LBAs Written
Represents the total size of all LBAs (Logical Block Address) required for all of the write requests sent to the SSD from the OS. To calculate the total size (in Bytes), multiply the raw value of this attribute by 512B. Alternatively, users may simply consult the Total Bytes Written indicator in Magician 4.0.
And, unfortunately, SSD's cannot erase... Wait, this story about pages and problems with writing ones has already been posted in the mean time.
morphine wrote:Let's just keep this in perspective - like Geoff has proven, it takes a LOT of terabytes to kill an SSD.
morphine wrote:That is true, but the biggest death factor for SSDs are, by far, controller/power issues.
morphine wrote:Let's just keep this in perspective - like Geoff has proven, it takes a LOT of terabytes to kill an SSD.