OK, I stand corrected. My bad... :)
On Wed, Oct 17, 2012 at 9:39 PM, Okky Hendriansyah <[email protected]> wrote: > Hi Alex, > > Quoting from VirtualBox End-User Manual: Virtual Storage > > "Like a real SATA controller, VirtualBox's virtual SATA controller operates > faster and also consumes less CPU resources than the virtual IDE controller. > Also, this allows you to connect up to 30 virtual hard disks to one machine > instead of just three, as with the VirtualBox IDE controller (with the DVD > drive already attached). Of these, the first four (numbered 0-3 in the > graphical user interface) are operated in IDE compatibility mode by > default." > > "Given this large choice of storage controllers, you may ask yourself which > one to choose. In general, you should avoid IDE unless it is the only > controller supported by your guest. Whether you use SATA, SCSI or SAS does > not make any real difference. The variety of controllers is only supplied > for VirtualBox for compatibility with existing hardware and other > hypervisors." > > Probably just like what I have assumed some time ago after reading the > manual, John wanted to improve the efficiency of the VM's disk I/O and the > VirtualBox's host CPU resources by using the SATA controller instead of IDE > controller. Another benefit that probably John wanted is to simulate more > than 4 drives on 1 VM. > > Just my two cents. > > Thank you. > Okky Hendriansyah > > On Wed, Oct 17, 2012 at 10:54 PM, Alex Smith (K4RNT) > <[email protected]> wrote: >> >> The way virtualization works, to the guest OSes view, is that it >> provides a standardized hardware environment within the guest, to >> minimize the need for specialized drivers, as well as portability >> between host systems, essentially clone your virtual machine, copy it >> to another host, and import it and start it up no problem. >> >> For Windows XP and older guests, at least IMO a virtualized IDE >> controller to the guest is more than enough - the storage controller >> only changes the driver that the guest uses to communicate with the >> virtual disk. You should not encounter any performance hits on SATA >> vs. IDE in a virtualized environment. >> >> The reason for providing these different controllers is precisely for >> this reason. If you were using a newer guest OS that supports it, SATA >> would be the preferred choice, however, if you were using raw disk >> access (which I have done in the past with VirtualBox), the same type >> of controller being passed to the guest may be a prudent idea. >> >> I had an HP ProLiant DL380 G4, using Ultra320 SCSI disks, and I added >> a disk shelf to it - for me to use raw disk access, I used a SCSI >> controller to the guest, to natively access the disks I made >> available. Now your mileage may vary, this may not be necessary, I may >> just have not known how to do this properly, but my use was only an >> unusual circumstance. >> >> Hope this helps. I'm still trying to wrap my head on *why* you need to do >> this. >> >> On Wed, Oct 17, 2012 at 11:37 AM, John A. Wallace <[email protected]> >> wrote: >> > Frank, hi. >> > >> > While I have enormous appreciation of Oracle VirtualBox, having no doubt >> > that most reasonable persons share this opinion as well, it is not yet >> > perfect. Yet, perfection of software is also not an expectation of >> > reasonable persons but only a mark of excellence toward which to strive >> > earnestly. >> >> >> -- >> " ' With the first link, the chain is forged. The first speech >> censured, the first thought forbidden, the first freedom denied, >> chains us all irrevocably.' Those words were uttered by Judge Aaron >> Satie as wisdom and warning... The first time any man's freedom is >> trodden on we’re all damaged." - Jean-Luc Picard, quoting Judge Aaron >> Satie, Star Trek: TNG episode "The Drumhead" >> - Alex Smith (K4RNT) >> - Dulles Technology Corridor (Chantilly/Ashburn/Dulles), Virginia USA >> >> >> ------------------------------------------------------------------------------ >> Everyone hates slow websites. So do we. >> Make your web apps faster with AppDynamics >> Download AppDynamics Lite for free today: >> http://p.sf.net/sfu/appdyn_sfd2d_oct >> _______________________________________________ >> VBox-users-community mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/vbox-users-community >> _______________________________________________ >> Unsubscribe: >> mailto:[email protected]?subject=unsubscribe > > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_sfd2d_oct > _______________________________________________ > VBox-users-community mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/vbox-users-community > _______________________________________________ > Unsubscribe: > mailto:[email protected]?subject=unsubscribe > -- " ' With the first link, the chain is forged. The first speech censured, the first thought forbidden, the first freedom denied, chains us all irrevocably.' Those words were uttered by Judge Aaron Satie as wisdom and warning... The first time any man's freedom is trodden on we’re all damaged." - Jean-Luc Picard, quoting Judge Aaron Satie, Star Trek: TNG episode "The Drumhead" - Alex Smith (K4RNT) - Dulles Technology Corridor (Chantilly/Ashburn/Dulles), Virginia USA ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ VBox-users-community mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/vbox-users-community _______________________________________________ Unsubscribe: mailto:[email protected]?subject=unsubscribe
