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When you select a custom configuration, the New Virtual Machine wizard prompts you to select the I/O controller type for the virtual machine. Workstation Pro automatically configures your virtual machine with the SCSI controller best suited for the guest operating system, but you can change the controller.

This site maintains listings of scsi, ide, drive, tape backup, and other storage related driver drivers available on the web, organized by company. From the devices on your list, I have a Sharkoon SATA Quickport Pro. As well as the SATA port multipliers and port selectors. Storage Executive is present and click Scan. Apps for SCSI Drivers. Join or Sign In. Sign in to add and modify your software. Sign in with Facebook Sign in with email. ITE IT8212 ATA RAID Controller. SCSIAdapter driver.

Workstation Pro installs an IDE controller and a SCSI controller in the virtual machine. SATA controllers are supported for some guest operating systems. The IDE controller is always ATAPI. For the SCSI controller, you can choose BusLogic, LSI Logic, LSI Logic SAS, or VMware Paravirtual (PVSCSI) adapter. If you are creating a remote virtual machine on an ESX host, you can also select a VMware Paravirtual SCSI adapter.

BusLogic and LSI Logic adapters have parallel interfaces. The LSI Logic SAS adapter has a serial interface. The LSI Logic adapter has improved performance and works better with generic SCSI devices. The LSI Logic adapter is also compatible with ESX Server 2.0 and later.

PVSCSI adapters are high-performance storage adapters that can provide greater throughput and lower CPU utilization. They are best suited for environments where hardware or applications drive a high amount of I/O throughput, such as SAN environments. PVSCSI adapters are not suited for DAS environments.

Some guest operating systems, such as Windows XP, do not include a driver for the LSI Logic or LSI Logic SAS adapter. You must download the driver from the LSI Logic website. Drivers for a Mylex (BusLogic) compatible host bus adapter are not obvious on the LSI Logic website. Search the support area for the numeric string in the model number, for example, search for 958 for BT/KT-958 drivers.

Selecting the VMware Paravirtual SCSI (PVSCSI) Adapter

In a Windows virtual machine:

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Since the Windows ISO does not include a driver for the VMware Paravirtual SCSI (PVSCSI) adapter.

1. Add a Floppy Drive and select the driver file from the C:Program Files (x86)VMwareVMware WorkstationResources*.flp folder on the Windows host.

   If you are running a Windows virtual machine on a Linux host, the driver is saved in the /usr/lib/vmware/resources folder by default.

2. During the Windows setup, select Load Driver > Browse and select the PVSCSI adapter driver file.

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In a Linux virtual machine:

The Linux distribution already includes the PVSCSI driver.

For more information about driver support, see the VMware Guest Operating System Installation Guide. For guest operating system support information, known issues, and SATA support, see the VMware Compatibility Guide available on the VMware website.

CDROM and DVD drives (and WORM devices) are accessible via the sr upper level device driver.While 'sr' is the device driver name, 'sr_mod' is its module name.The device file name is either /dev/sr<n> or/dev/scd<n>.

Following is a diagram illustrating the CDROM subsystem of which sr is apart:

The architecture of the CD-ROM subsystem.

This diagram glosses over some of the differences between the protocol stacks. CDROM device names are not maintainedby the uniform CDROM layer but rather by each individual protocol stack.In the case of the SCSI subsystem, device names are maintained by thesr driver while the IDE subsystem maintains device names with itscentral 'ide' driver (i.e. not by the ide-cd driver). USB and IEEE1394cd devices names are maintained by their respective stacks. This maypartially explain why the /dev/cdrom is often asymbolic link to the appropriate subsystem's device name.

Two types of SCSI devices are accessible via the sr driver:

• CD-ROM devices (including DVD players)[SCSI peripheral device code is 5]

• 'Write-once read-multiple' devices which are known as WORMs.[SCSI peripheral device code is 4]

The sr driver is capable of recognizing 256 CDROM/DVD drives when it is loaded at kernel boot time or later as a module. However, once it is loaded, it will only recognize a fixed number of additional drives. The number of additional drives that can be accommodated is set by the kernelconfiguration parameter CONFIG_SR_EXTRA_DEVS whose default value is 2.

People often use the dd command to read a data CDROMcontaining an iso9660 file system. If a count argument is not given thenthe dd command will read the number of 2048 byte sectorsindicated by the SCSI Read Capacity command. Unfortunately this can include unwritten (or 'run out') sectors at the end of the image that cancause I/O errors. Use the isosize command (see its man page) to find the true length of the iso9660 image and use that in the'count=' argument given to the dd command.

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9.2.1. sr boot parameters

None.

9.2.2. sr module parameters

Doing a test to find out if a cdrom drive supports XA mode (mode 2) triggersfirmware bugs on some drives. Consequently the check for XA mode support isturned off by default. The following module parameter is provided:to override the default. [Currently there seems to be no way to turn onXA mode testing when the sr driver is built into the kernel.]

9.2.3. sr proc interface

All the following files are readable by all and produce ASCII outputwhen read:They reflect the current state of the CDROM subsystem. This locationis part of the procfs's window through to the sysctl configurationmechanism (see man sysctl). All butinfo are writable by the superuser. There isa column for each CDROM and DVD player in the system ininfo (not just SCSI devices).

As anexample, the auto eject feature can be turned on by the superuser withthe command echo '1' > /proc/sys/dev/cdrom/autoeject.This will cause cdroms to be ejected from the drive when unmounted.

9.2.4. ATAPI cdroms

Many Linux users have no SCSI devices (or adapters) in their systems. Theybecome a little perplexed as to why cd writer software (e.g. cdrecord and cdrdao)and cd music reading programs (e.g. cdparanoia) usethe Linux SCSI subsystem. The answer is that these programs need lower levelaccess to these devices. ATAPI (ATA Packet Interface) is essentiallya SCSI command set sent over an ATA [1]transport. [The discussion in this section is also applicable to ATAPItape drives and ATAPI floppy drives.]

Currently both cdrecord and cdparanoiainterface to the SCSI generic driver (sg) and, in the case of ATAPI cd devices, use the ide-scsi pseudo device driver to access the hardware.This may change in the future as in the 2.4 series kernels a packetinterface ioctl has been added to the uniform cdrom layer (see the diagramin Section 9.2 above).[2]

The default action of the IDE subsystem in Linux is to claim all ATAdevices for its built-in drivers. In the case of an ATAPI cd writer, it will be claimed by the built-in ide-cd driver. Once this has happened, the SCSI subsystem is unable to get control over an ATAPI device. The ide-scsi (pseudo lower level SCSI) driver can only register ATAPI devices in the SCSI subsystem that have not already been claimed by the IDE subsystem.

Notice the built-in qualification in the previous paragraph. If both the ide-cd and ide-scsi drivers are modules then the first one loaded will claim the ATAPI cd devices (e.g. cd/dvd readers and writers). Furthermore you can switch the controlling driver module by rmmod-ing one and modprobe-ing the other.

Probably the most flexible way to instruct the IDE core driver that youwant the cd writer at /dev/hdd accessible tocdrecord is to use the kernel boot option: 'hdd=ide-scsi'. This will cause the ide-cd driver to bypass /dev/hdd (irrespective of whether ide-cd driver is built-in or a module). As long as the ide-scsi driver is built-in or a module then it will 'capture' the cd writerat /dev/hdd (with the IDE core driver loading theide-scsi module if required).

The ide-cd driver module can be instructed to ignore certain ATA deviceswith the following syntax:In this case the ide-cd driver will ignore the devices at /dev/hdc and /dev/hdd .This effect can also be accomplished by placing a line like this: 'options ide-cd ignore=hdd' in the /etc/modules.conf file.

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A new option added in the lk 2.4 series is of the form 'hdd=scsi'.This option seems to have a similar function to the 'hdd=ide-scsi'option discussed above. Furthermore 'hdd=scsi' can only be used ifboth the SCSI mid-level and the ide-scsi drivers are built into thekernel (otherwise 'BAD OPTION' is reported by the ide_setup function).

To find out whether an ATAPI cd device is 'owned' by the SCSI subsystem, the output of cat /proc/scsi/scsi can be checked. Another technique is to observe the 'drive name:' line ofcat /proc/sys/dev/cdrom/info for 'sr' entries. Thefollowing output is from my system:

Once an ATAPI cd writer at /dev/hdd has been registered by the SCSIsubsystem, then cdroms should be mounted via the 'scd' device nameand cd players should also use the 'scd' device. Strangely thehdparm command should still use the /dev/hdd device file (or the 'echo ... > /proc/ide/hdd/settings'method described in this section).[3]

Notes[1]

ATA is the modern name for what was previously known as IDE and/or EIDE.Note that the subsystem that controls ATA devices in Linux is calledthe 'IDE' subsystem for historical reasons.

[2]

Other ATA devices such as tapes and floppies often use the ATAPI interface. However, the vast majority of ATA disks do not usethe ATAPI interface.

[3]

In the linux 2.4 kernel series there has been an increase in problems whenthe ide-scsi driver is used so that cdrecord can controlATAPI (IDE) cd writers. The problem may be related to the aggressive manner in which the IDE subsystem attempts to optimize the speed of data transfers on devices it controls. Some people experiencing timeouts and machine lockups have found that reducing the DMA setting via the hdparmcommand has fixed the problem. If the cd writer is connected to /dev/hdd then users have reported success with one ofthese two commands: The first one turns off DMA completely while the second one sets it in'multiword DMA mode 2'. Cd writers do not need the types of speeds that modern disks utilize. Even burning at 'x16' implies a sustained transfer rate of 16 times 150 KB/sec which is approximately 2.4 MB/sec, notreally that fast. There has also been a report that moving a cd writer offa high speed IDE controller (Promise) and back to the motherboard's lower speed IDE controllers has fixed a random IDE bus reset problem. Another report suggests reducing (or turning off) the DMA on the IDE hard disk can also stop lockups.