https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191810
Bug ID: 191810
Summary: some SSDs should use UNMAP instead of ATA_TRIM
Product: Base System
Version: 10.0-RELEASE
Hardware: amd64
OS: Any
Status: Needs Triage
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
System: FreeBSD fearless2 10.0-RELEASE-p7 FreeBSD 10.0-RELEASE-p7 #0: Wed Jul 9
12:19:19 EDT 2014 root@fearless2:/usr/obj/usr/src/sys/CAMDEBUG amd64
On my SSDs (IBM TX21B10400GE8IBM) UNMAP should be used instead of ATA_TRIM as
UNMAP seems much more reliable.
Using TRIM, I get frequent timeouts:
http://pastie.org/pastes/9368423/text?key=i4gmruxdtjars9fduq8w
(da6:mps1:0:5:0): ATA COMMAND PASS THROUGH(16). CDB: 85 0d 06 00 01 00 03 00 00
00 00 00 00 40 06 00
(da6:mps1:0:5:0): CAM status: Command timeout
(da6:mps1:0:5:0): Retrying command
Is it possible to default to using UNMAP, if not for everything than for
whitelisted devices?
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