Hi,
From the recent recently released sata SSDs, a good few new models - despite being RZAT technically - don't report it at all. Neither basic deterministic read after trim, not deterministic read zero after trim.
A few recent models that report basic trim support and nothing else (with most recent firmwares as of this writing):
- crucial mx500 (mx300, even ancient m4 - reported rzat)
- samsung 850s & 860s (both pro and evo) (840pro reported rzat)
- adata sx950u (800u reported rzat, not sure about 900u)
Particularly surprising are samsung "pro"s in the above list.
While this would be of no issue normally (as they all behave in rzat fashion as far as I know), some controllers like LSI 2308 have "sensitive" firmware and block trims altogether if they don't detect at least DRAT feature.
So my question is if you can suggest some other brands/models - that do report rzat or at least drat - similar in price/market position to the models listed above.
The support can be easily checked with hdparm tool (e.g. hdparm -I /dev/sda), if the disk supports it it will return (among other features):
- for drat: "Deterministic read data after TRIM"
- for rzat: "Deterministic read ZEROs after TRIM"
From the recent recently released sata SSDs, a good few new models - despite being RZAT technically - don't report it at all. Neither basic deterministic read after trim, not deterministic read zero after trim.
A few recent models that report basic trim support and nothing else (with most recent firmwares as of this writing):
- crucial mx500 (mx300, even ancient m4 - reported rzat)
- samsung 850s & 860s (both pro and evo) (840pro reported rzat)
- adata sx950u (800u reported rzat, not sure about 900u)
Particularly surprising are samsung "pro"s in the above list.
While this would be of no issue normally (as they all behave in rzat fashion as far as I know), some controllers like LSI 2308 have "sensitive" firmware and block trims altogether if they don't detect at least DRAT feature.
So my question is if you can suggest some other brands/models - that do report rzat or at least drat - similar in price/market position to the models listed above.
The support can be easily checked with hdparm tool (e.g. hdparm -I /dev/sda), if the disk supports it it will return (among other features):
- for drat: "Deterministic read data after TRIM"
- for rzat: "Deterministic read ZEROs after TRIM"