So you have used SVM to mirror your disk, and one of the two drives fails. Aren’t you glad you mirrored them! You don’t have to do a restore from tape, but you are going have to replace the failed drive.
Many modern RAID arrays just require you to take out the bad drive and plug [...]
For some reason RHEL 3 comes out of the box configured to see only the first Lun on a SCSI channel. This is usually not a problem, as the first Lun is all you care about, but in some instances, you will need to configure the SCSI module to see multiple Luns.
In this case [...]
There is a convention of thought amongst Oracle DBA’s that databases should never be installed on disks that are configured into a RAID 5 array. The argument goes, that since Oracle accesses and writes to random points within relatively large files, the overhead of constantly calculating block-level parity on these files is substantial, resulting in [...]
This summer we have been migrating a bunch of data to our shiny new InfoTrend EonStor A12F-G2221. With 1G battery backed cache, it’s a screaming box of disk, and it looks cool to boot. There is a gotcha though if you want to direct connect it to QLogic QLA2340 card on a REL 3 server. [...]
If you’re familiar with UNIX, you know that changing mount points is really pretty easy. All you have to do is go into “/etc/fstab”, “/etc/vfstab” (or whatever your flavor of UNIX happens to call its filesystem table) and change the mount directory.
If, for instance, you had a Solaris box, and you wanted to make the [...]
This appendix describes the design and construction of lock picking tools.
A.1 Pick Shapes
Picks come in several shapes and sizes. Figure A.1 shows the most common shapes. The handle and tang of a pick are the same for all picks. The handle must be comfortable and the tang must be thin enough to avoid bumping pins [...]
Earlier this month, a company came along and asked for a RAID 10 array. Understanding that RAID 10 is a cooler sounding way of saying RAID 1+0, I understood it as a mirror set that is striped across another mirror set. Simple enough… Just concatenate a couple of mirrors, and you’ve got RAID 10.
Indeed, RAID [...]
Every time I have to spec a solution using Solaris, I always have to answer a bunch of questions in meetings about why Sun is so costly compared to Dell servers. Usually the reason for the higher price is not the servers (especially with X86 sun), but rather the storage. Since Sun does not offer [...]
UPDATE TO “Solaris Disk Partition Layout & Mirroring Scripts“
Several Months ago, I tried to use my old mirroring scripts on a new Solaris 9 install. I found that the the kernel would panic upon reboot because it was unable to mount /. I tried many things, including opening a support call with Sun. They [...]
