{"id":698,"date":"2008-01-16T05:57:40","date_gmt":"2008-01-16T10:57:40","guid":{"rendered":"http:\/\/www.bytebot.net\/blog\/archives\/2008\/01\/16\/server-downtime"},"modified":"2008-01-16T07:04:18","modified_gmt":"2008-01-16T12:04:18","slug":"server-downtime","status":"publish","type":"post","link":"http:\/\/www.bytebot.net\/blog\/archives\/2008\/01\/16\/server-downtime","title":{"rendered":"Server downtime"},"content":{"rendered":"

Khairil talks about server downtime<\/a>, and I can attest to that (hogwarts is just above gambit). The Dell arrived<\/a> on Friday, popped Centos 5.1 on it, realised that if you ticked “Virtualization”, you ended up not getting a regular kernel (no big deal, eh?). Configured it as best as could be configured, then headed out to the data center on Saturday morning. This after some fiasco of sleeping for under 4-hours, seeing that I was out on Friday night.<\/p>\n

Removed the old box, installed the new one, everything came up, and life was dandy. Went over to C-ZONE in Low Yat to get my disk exchanged – it was one-to-one, seeing that it was within the first week. Very nice. Remotely configured the box with Zimbra again, and ZCS 5.0 is working fine. Its great to see that Zimbra figured out what the problem was with the RHEL4\/CentOS4 installs<\/a> of Zimbra. Fixed up the database, restored the websites, all remotely – I wonder if this kind of magic works in Windows land? I just love Unixes.<\/p>\n

The Dell box is a 64-bit box, with full virtualization support. Question now is: how do I get more IPv4 IPs if the ISP only gives you one?<\/strong> While there’s some negotiation going on so I can get more, it’d be a shame if I had to create some Xen VMs to be IPv6 only.<\/p>\n

Incidentally, if anyone wanted to see what a RAID failed device looks like, here’s some output:
\n
\n[root@hogwarts ~]# mdadm -D \/dev\/md0
\n\/dev\/md0:
\nVersion : 00.90.03
\nCreation Time : Mon Jan 7 02:49:59 2008
\nRaid Level : raid1
\nArray Size : 485203072 (462.73 GiB 496.85 GB)
\nDevice Size : 485203072 (462.73 GiB 496.85 GB)
\nRaid Devices : 2
\nTotal Devices : 2
\nPreferred Minor : 0
\nPersistence : Superblock is persistent<\/code>
\n
\nUpdate Time : Wed Jan 9 19:44:45 2008
\nState : clean, degraded
\nActive Devices : 1
\nWorking Devices : 1
\nFailed Devices : 1
\nSpare Devices : 0
\n<\/code>
\nUUID : a502d8a1:724a68ab:cac9860f:943d44a5
\nEvents : 0.22190
\n<\/code>
\nNumber Major Minor RaidDevice State
\n0 0 0 0 removed
\n1 8 17 1 active sync \/dev\/sdb1<\/code>
\n
\n2 8 3 - faulty spare \/dev\/sda3<\/code>
\n
\n[root@hogwarts ~]# cat \/proc\/mdstat
\nPersonalities : [raid1]
\nmd0 : active raid1 sdb1[1] sda3[2](F)
\n485203072 blocks [2\/1] [_U]<\/code><\/p>\n

unused devices: <none><\/p>\n

Technorati Tags: raid<\/a>, dell<\/a>, centos<\/a>, ipv4<\/a>, xen<\/a>, sysadmin<\/a><\/p>\n

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