Mailinglist Archive: opensuse (818 mails)

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Re: [opensuse] Recover Linux Raid 0 with 2x2port 3Ware Raid 1 cards
  • From: Per Jessen <per@xxxxxxxxxxxx>
  • Date: Sat, 03 Sep 2011 10:46:26 +0200
  • Message-id: <j3sph1$ot7$1@saturn.local.net>
John Andersen wrote:

On 9/1/2011 11:38 PM, Per Jessen wrote:
Brian K. White wrote:

Planning is wise, but that doesn't change the fact that it's an
inherently inflexible solution that's waiting for you to slip up to
burn you.

If you didn't happen to have any spare scsi disks on hand, most
people today would not be able to lay their hands on one in less
than 24 to 48 hours no matter how much they're willing to pay for
overnight,

If ordered before 17:00 and in stock, delivery usually follows the
next day with regular Priority Mail. (that's from a normal web-shop
available to everyone).

So posts the man from Zürich, a country of 15,940 square miles ;-)

Point taken :-) (although the service is the same in Germany).

Regardless, a hardware array will typically be configured with 1
spare drive sitting idle, so you'd be replacing the failed drive a
while after your array had already recovered. No need to hurry at
all.


Plus one on the hot spare(s).

But that raises another issue. When the customer called me sevral
years ago because his system was down, I found that his hardware
controller was reporting a degraded raid 5. Turns out the hot spare
had been put into use 6 months earlier, and a second drive had failed.

Since they seldom looked at the server, and never rebooted it
they got no warning of this at all.

SMART and SNMP monitoring. (or equivalent).

If you buy all your disks for the array at the same time you have to
be prepared for them to fail very close to each other.

Yes, if you're planning on buying lots of disks, stage your purchases.


--
Per Jessen, Zürich (20.2°C)

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