Installing a Sony CRX195A1 CDRW Drive in Red Hat 7.3
Let's suppose you had a different combination of drives. In a system with two hard drives (/dev/hda and /dev/hdb) and a CD-ROM on /dev/hdc you would add the CD writer to /dev/hdd. Further, let's suppose that you didn't need or want to do disk-to-disk copies. After physically connecting the drive and powering up, you would first add the line append="hdd=ide-scsi" to lilo.conf and then add the line ignore="hdd" to /etc/modules.conf. Reboot once more and voilà--a working CD writer.
It should be noted that you can enable IDE-SCSI emulation on any combination of drives you wish. They needn't be contiguous in the drive chain, nor do you need to enable IDE-SCSI for all the drives on an IDE channel--you may do so selectively. That is, you can enable IDE-SCSI emulation for /dev/hdd but not /dev/hdc, as in the example above. Also, you only have to enable IDE-SCSI on optical drives other than your CD writer if you wish xcdroadst/cdrecord to see them and be able to do disk-to-disk copies.
Writing Speed: 40xRewriting Speed: 12xRead Speed: 48xRandom Access Time: 150msBuffer Memory: 2MBBuffer Underrun Technology: YES!Write modes: Disc At Once, Track At Once, Session At Once, Packet WritingSupported Disc Formats: CD-DA, CD-ROM (XA) Video CD, Photo CD (multi-session) CD Text, CD Extra
System Requirements (from box)
Pentium II 400MHz or faster
64MB RAM and 1 GB HD space
System as Tested
Pentium III 1000MHz
Red Hat Linux 7.3 with default 2.4.18-3 kernel
cdrecord version 1.10-11 (provided by Red Hat)
xcdroast version .98-a9-8 (provided by Red Hat)
The drive was cheap ($89.99), and the $20 mail-in rebate really was what made me decide on this model. I tested writing at speeds up to 32x (the version of xcdroast that I have only goes up to 32x), and I was impressed with the overall writing speed of the drive. In the ISO burning test, I burned the Gentoo live CD ISO image (approximately 230MB) in 66 seconds! The Sony name made me feel comfortable, as I have had various other Sony optical drives in the past with uniformly good results. cdrecord did use the burnproof capabilities of the drive, which was another plus.
The bad part is no Linux support. The complete lack of help from live support was disappointing, and the drive came with no extras or frills. For instance, there were no blank disks of any sort included in the box. The manuals and quick-start guides were disappointing and next to useless even for a Windows installation. I would not recommend this drive for an inexperienced Windows user, but for a Linux user who had read all the HOWTOs and FAQs, it should be no problem at all.
The FAQs and HOWTOs I read were distribution-neutral, and the steps contained therein should work equally well for any modern distro.
Various IRC Users in #cofr on gamesnet.net
Add append="hdX=ide-scsi" to lilo.conf or grub.conf, where X is the letter of the CD writer. Remember to add in any additional optical drives if you wish to do CD-to-CD copying, for example, append="hdb=ide-scsi hdc=ide-scsi".
Modify /etc/modules.conf to include the line options ide-cd ignore="hdX", where X is the letter(s) of the drive(s) you are using.
default=0 timeout=10 splashimage=(hd0,0)/grub/splash.xpm.gz title Red Hat Linux (2.4.18-3) root (hd0,0) kernel /vmlinuz-2.4.18-3 ro root=/dev/hde3 vga=792 append="hdb=ide-scsi hdc=ide-scsi" initrd /initrd-2.4.18-3.img
alias parport_lowlevel parport_pc alias sound-slot-0 emu10k1 post-install sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -L >/dev/null 2>&1 || : pre-remove sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -S >/dev/null 2>&1 || : alias usb-controller usb-uhci alias eth0 3c59x alias char-major-195 NVdriver options ide-cd ignore="hdb hdc"
Please note that the author assumes no responsibility for any losses, damages or incidents caused by utilizing the information herein. This information is provided as is with no guarantees about its viability or accuracy in any system other than the author's own. Use this information at your own risk.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
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