[j-nsp] High failure rates for M7i/M10i hard disks?

[Richard Gross]

Wouldn't a hard drive handle reads/writes to /var/log better than a
Compact Flash device?

I mean, on my M7i I have:

ad0: 244MB <SanDisk SDCFB-256> [695/15/48] at ata0-master PIO4
ad1: 19077MB <HTS548020M9AT00> [38760/16/63] at ata0-slave UDMA33

and the router boots off ad0:

I'm assuming the live file system is on ad0: since that is the boot
device.

My question is if the router is writing to the Compact Flash every 10
seconds 24x7, how long will a Compact Flash work before breaking?

I know I'm missing something so I'm sure I will be enlightened
shortly...

Thanks.
								richg

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Lars Erik
Gullerud
Sent: Monday, August 29, 2005 7:19 AM
To: Joe McGuckin
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] High failure rates for M7i/M10i hard disks?

On Fri, 26 Aug 2005, Joe McGuckin wrote:

> It seems like this was an ill-advised attempt to lower the
manufacturing
> cost of the RE.
>
> However, for the price they charge for the RE ($15,000 list price for
> compact PCI cpu card that probably cost them no more than $2500), one
would
> certainly think that Juniper would specify 'industrial' or 'server'
quality
> components. I hope we're not going to see further reliability issues
because
> some purchasing manager decided to save $20 by specifying other
components
> that were designed with a lifetime 5% or 10% duty-cycle.

Putting lower-spec (read: cheaper) HDDs into REs where they ALSO shaved 
costs by no longer putting internal flash on them by default, is
hopefully 
not symptomatic of a trend to let short-term financial gains outweigh 
engineering principles and customer satisfaction. However, with other 
recent Juniper decisions seeming to follow the same pattern (hm, IPv6 
licencing, anyone?), I must admit to having some fear for the future
these 
days, after having preached Juniper to management and customers for the 
last few years...

/leg
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