Date: Tue, 25 Aug 2015 12:46:53 +0100 From: Matthew Seaman <matthew@FreeBSD.org> To: freebsd-questions@freebsd.org Subject: Re: How to minimize the number of writes to CF card? Message-ID: <55DC55AD.9070209@FreeBSD.org> In-Reply-To: <55DC53A8.3020508@FreeBSD.org> References: <1440496718919-6034932.post@n5.nabble.com> <55DC3FBD.8080102@FreeBSD.org> <1440500542763-6034941.post@n5.nabble.com> <55DC53A8.3020508@FreeBSD.org>
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On 2015/08/25 12:38, Matthew Seaman wrote:
> On 2015/08/25 12:02, zhup wrote:
>> My proposal of solution with "noatime" and "softdep" flag:
>>
>> # vi /etc/fstab
>> /dev/sd0a / ffs rw,noatime,softdep 1 1
>>
>> What to you think about it?
>=20
> 'softdep' is not something FreeBSD understands. (I think it's an
> OpenBSD-ism)
To clarify: it's not something that FreeBSD understands in fstab(5).
You can use tunefs to enable / disable soft updates on a filesystem:
tunefs -n enable /dev/sd0a
(unmount the FS first)
However, I don't think softupdates has much effect on the /number/ or
writes made to the filesystem. It's all about re-ordering writes to
ensure metadata consistency.
Cheers,
Matthew
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