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Date: Sun, 28 Jan 2024 21:04:20 +0700
From: Bagas Sanjaya <bagasdotme@gmail.com>
To: Frank Tornack <f-tornack@t-online.de>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux NVMe <linux-nvme@lists.infradead.org>
Cc: Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@fb.com>,
	Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
	Chaitanya Kulkarni <kch@nvidia.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Damien Le Moal <dlemoal@kernel.org>
Subject: Re: Western Digital SSD freezes on power saving
Message-ID: <ZbZe5OPlqhwi_erM@archie.me>
References: <dfe9213bb86939ca4502b5b3fdd3ab77ef1b6f1b.camel@t-online.de>
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On Sun, Jan 28, 2024 at 01:26:23PM +0100, Frank Tornack wrote:
> Hash: SHA512
>=20
> Hello Linux kernel developers and experts,
>=20
> I have a question that I think is not tied to a specific distribution
> and goes pretty deep into the Linux kernel. I hope you can help me
> without subscribing to the mailing list and remember to include me in
> the answer discussion.=20
>=20
> In my old notebook I used an nvme-ssd from WD (wds500g1b0c-00s6u0),
> which is affected by a well-known bug. I currently use the parameter
> `nvme_core.default_ps_max_latency_us=3D0` to prevent the system from
> freezing.=20
>=20

What well-known bug?

> I would like to use a new SSD in my new notebook. However, as it is
> difficult to sell used SSDs, I would like to continue using the old SSD
> affected by the bug. I plan to move the SSD to a Thunderbolt enclosure
> for this purpose. I think since Thunderbolt is based on PCIe, the same
> energy saving measures and the associated bugs will probably apply.
>=20
> In the hope that my new SSD doesn't have the same bug, I would prefer
> not to disable the Powersafe in the laptop. Is there a way to set this
> flag only for a specific SSD? By identifying it by name or serial
> number?=20
>=20
> I apologise prophylactically if my question is completely out of place
> and thank you for your help. As a long-time Linux user, I would also
> like to thank you in general. If you have any follow-up questions,
> please do not hesitate to contact me.
>=20

Confused...

--=20
An old man doll... just what I always wanted! - Clara

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