[...] > I must not be the only one ignoring you, causing you to use > multiple subdomains. It seems sad that my changing address occasionally when they get spammed as they get "harvested" may tickle someone's foolish arrogance of thinking themselves so important that it is done just to get their worthless attention. http://www.sabi.co.uk/blog/0705may.html?070527c#070527c Unfortunately in some cases my technical comments therefore get replies without any technical content. As to this though: > without going in detail about all other possible cases. There are indeed many twists and turns and "legacy" situations, as in several places timeouts and retries are hardcoded, and IIRC the "default" for retries is 5. But I have spent a bit of time looking at some of the weirdness and it turns out that nowadays the 'sd' module defines a 'max_retries' setting in the device attributes (rather than a module parameter as in 'nvme_core'): https://elixir.bootlin.com/linux/latest/source/drivers/scsi/sd.c#L598 It is only available from 5.10 and would be for example at: /sys/class/scsi_disk/0:0:0:0/max_retries I have also noticed that XFS bizarrely has its own layer of recovery on top of that of the Linux IO subsystems and of the device itself: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_file_systems/configuring-xfs-error-behavior_managing-file-systems https://elixir.bootlin.com/linux/v5.13.5/source/fs/xfs/xfs_buf.c#L1264
