An installation cd/dvd is essential in order to repair the start-up disk. The Mac needs a booting platform & this cd/dvd provides exactly the same. One cannot repair the boot partition while initiating the system from it. Thankfully, there are couple of disk repair software such as Stellar Volume Repair and Disk Warrior that provides bootable disk if your installation cd is missing. You can boot from the DVD created by the software and then perform repairment with the help of these partition repair tools.
To fix disk repair on a Mac disk utility without an installation CD, access the Utilities box in the Applications folder.
1. put an installation disk in and use the repair utility
Emergency Repair Disk (EPD)Information about your current installation.
The Disk Utility application found in the Utilities folder within the Applications folder can scan the disc and repair permissions.
It might but most likely it will not. You might even get a warning state that you are trying to use different installation disk.
Emergency Repair Disk (ERD), which contains information about your current installation. Use only as a last resort because it restores the system back to the original state after initial instalation of OS.
windows recovery console
Through the Diskpart Utility you can delete dynamic volumes. This utility can be found in the Windows 7 installation disk or the Windows 7 recovery disc.
Yes, Boot with disk, then choose "Windows Recovery Console"
windows recovery console
OS X Yosemite recovery problem can be resolved when you use the right Disk Utility from a Recovery HD to repair the disk.
Does it say " this partition is formatted mac journal please change to.....wateva" if so u have 2 actully change the format the fatt32
You'll need to boot from something else, a rescue disk, the original installation disk or another disk that lets you repair the damage caused by the virus.