Berkeley CSUA MOTD:Entry 30272
Berkeley CSUA MOTD
 
WIKI | FAQ | Tech FAQ
http://csua.com/feed/
2025/07/08 [General] UID:1000 Activity:popular
7/8     

2004/5/18-19 [Computer/SW/OS/FreeBSD, Computer/HW/Drives] UID:30272 Activity:high
5/18    I have an ATA raid (5), but linux insists on trying to detect each
        of the 4 drives individually upon startup, which takes a while since
        it isn't really successful.  How do i stop it from doing that?  Is
        that what the -nodma startup option is for?    thanks.
        \_ obGetRealOS.... ok... which distribution?
           \_ happens on both RedHat and Suse.  Am running SuSE 9.1
              \_ Is this during kernel bootup or during rc.d/* execution?
        \_ Are you doing hardware or software raid?  If hardware, which
           hardware?
           \_ By the way, has anyone successfully used vinum with +1TB
              filesystems on FreeBSD 5.2.1?  I have trouble newfsing
              big filesystems.
              \_ i had trouble with freebsd 5 correctly recognizing the disk
                 geometry of all the disks, so i switched to freebsd 4 and
                 it works.  i am unable to get it to successfully boot
                 off of a vinum / partition. - danh
              \_ I was jumping for joy when I finally got pf installed *and*
                 setup as the first program just after the NICs are initialized
                 but before the gateway is set.  Now you want >1TB partitions
                 too?  :-)  I'll share the pf 'secrets' if you need that.
                 \_ Um.  is this really all that hard?
                    \_ Yes.  Have you done it?  Were you already FreeBSD Guru
                       #1 before doing so?  This isn't enough:
                        (cd /usr/ports/security/pf && make install)
                       You need to build a new kernel with the right options,
                       change rc.conf, and rewrite the pf.sh.sample they
                       provide.  About 2/3rds of the changes are documented.
                 \_ Please do share.  I'm a linux guy who's currently playing
                    around with setting up a freebsd machine.
2025/07/08 [General] UID:1000 Activity:popular
7/8     

You may also be interested in these entries...
2013/5/6-18 [Transportation/Car, Computer/HW/Printer] UID:54673 Activity:nil
5/6     http://goo.gl/KiIMT (shortened link from http://HP.com)
        seems like I get these every 6 months or so from HP.  Do all drives
         have these kind of issues and I only see the ones from HP because
         they are diligent about reporting/fixing these issues?  Or do they
         suck?   (It's not actually their drives so...)  Also, do I really
         need to bring down my production infrastructure and fix all this
	...
2012/1/4-2/6 [Computer/HW/Drives] UID:54281 Activity:nil
1/4     I want to test how my servers behave during a disk failure and
        a RAID reconstruction so I want to simulate a hardware failure.
        How can I do this in Linux without having to physically pull
        a drive? These disks are behind a RAID card and run Linux. -ausman
        \_ According to the Linux RAID wiki, you might be able to use mdadm
           to do this with something like the following:
	...
2011/9/14-10/25 [Computer/HW/Drives] UID:54173 Activity:nil
9/13    Thanks to Jordan, our disk server is no longer virtualized. Our long
        nightmare of poor IO performance should hopefully be over. Prepare for
        another long nightmare of poor hardware reliability!
        ...
        Just kidding! (I hope)
        In any case, this means that cooler was taken out back and shot, and
	...
2011/2/14-4/20 [Computer/SW/Unix] UID:54039 Activity:nil
2/14    You sure soda isn't running windows in disguise?  It would explain the
        uptimes.
        \_ hardly, My winbox stays up longer.
        \_ Nobody cares about uptime anymore brother, that's what web2.0 has
           taught us.  Everything is "stateless".
           \_ You;d think gamers would care more about uptime.
	...
2010/7/22-8/9 [Computer/SW/OS/FreeBSD, Computer/HW/Drives] UID:53893 Activity:nil
7/22    Playing with dd if=/dev/random of=/dev/<disk> on linux and bsd:
        2 questions, on linux when <disk>==hda it always gives me this off
        by one report i.e. Records out == records in-1 and says there is an
        error. Has anyone else seen this?  Second, when trying to repeat this
        on bsd, <disk>==rwd0 now, to my surprise, using the install disk and
        selecting (S)hell, when I try to dd a 40 gig disk it says "409 records
	...
2010/1/22-30 [Computer/HW/Laptop, Computer/SW/OS/OsX] UID:53655 Activity:high
1/22    looking to buy a new development laptop
        needs ssdrive, >6 hr possible batt life, and runs linux reasonably
        Anyone have a recommendation? Thx.
        \_ thinkpad t23 w ssdrive and battery inplace of drive bay
        \_ Ever wondered what RICHARD STALLMAN uses for a laptop?  Well,
           wonder no more!
	...
2009/10/27-11/3 [Computer/HW/Drives] UID:53474 Activity:nil
10/27   I just read an article that Facebook had moved their database
        to all SSD to speed throughput, but now I can't find it. Has
        anyone else seen this? Any experience with doing this? -ausman
        \_ I hope you're not running mission critical data:
           http://ask.slashdot.org/story/09/10/27/1559248/Reliability-of-PC-Flash-SSDs?from=rss
        \_ Do you have any idea how much storage space is used by Facebook,
	...
2009/8/21-9/1 [Computer/SW/Unix] UID:53297 Activity:nil
8/20    When I use rsync to backup, it's pretty cool except in cases where
        I rename a directory name from the source. Rsync will just do
        a plain copy. Is there a program that'll detect renaming of
        directories (by checking for children files), or at least
        move them to a dated directory?
        \_ Not related but beware of using rsync as a backup tool.
	...