Messages in this thread | | | Date | Thu, 16 Apr 2009 09:49:26 -0400 | From | Mark Lord <> | Subject | Re: USB storage no-boot regression (bisected) |
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Arjan van de Ven wrote: > On Thu, 16 Apr 2009 11:51:53 +0100 > Alan Cox <alan@lxorguk.ukuu.org.uk> wrote: > >>>> Though it's an onboard USB SSD, not a pluggable stick. >>> Wow, that's insane. Leave it to a hardware designer to use a bus >>> that you never know if you have discovered all the devices to be >>> the primary device to boot from. >> Let me see: >> >> - Standardised small component >> - Low pin count and low wire count bus >> - Cheap >> >> In an embedded environment where you know the device is wired in at >> software level that strikes me not as insane but very sensible. > > I'm not surprised usb is used for storage. What I am surprised at is > that USB is used in such high end environments that rootwait is not > sufficient and that the panic-rebooter is needed for the reliability. ..
Failover and redundancy are standard requirements for really reliable systems. As good as a component may be, there's always anticipation that it will fail someday, and multiple ways of detecting/overcoming failures must be built-in.
In this case, imagine *two* such SSDs.
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