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The Macintosh Quadra 950 (also sold with additional software as the Workgroup Server 95) is a personal computer designed, manufactured and sold by Apple Computer, Inc. from March 1992 to October 1995. It replaced the Quadra 900 that was introduced several months earlier, increasing the CPU clock rate of its 68040CPU from 25 MHz to 33 MHz, and improving the graphics support.^[2] The two computers were otherwise identical, including the price. With a Macintosh Processor Upgrade Card installed, this computer is known as the Power Macintosh 950.

In 1993, the 950 was overtaken in performance by the less expensive Quadra 800 and 840AV. The newer Quadras had the addition of interleaved RAM, as well as an enhanced video system and SCSI bus. However, their more compact (mini-tower) case offered less expansion capability, so the 950 (due to its mid-tower case allowing 6 slots to be supported) was kept in continued production for the server market, outliving the 800 and 840AV. Also, the Quadra 800 was not capable of operating at 24-bit color, regardless of how much VRAM is installed or whether an external video card is used, while the Quadra 900 and 950 were capable of 24-bit color.^[3]

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The Quadra 950 was replaced by the PowerPC-based Power Macintosh 9500 in May 1995, with sales continuing until October.^[4] It was the last Macintosh Quadra sold by Apple, and one of the last 68k models to be discontinued, due to its high RAM capacity and large number of NuBus slots. The Workgroup Server 95 was succeeded by the Workgroup Server 9150.

Hardware[edit]

The logic board has five NuBus slots and a Processor Direct Slot, but due to the positioning of the PDS it is not possible to use one of the NuBus slots when a PDS card is installed.^[2] The NuBus-90 standard is partially supported, allowing for cards to run at 20 MHz, and two of the slots provide 25 watts of power instead of the usual 15 watts.

The logic board has 1 MB of on-board video RAM, with 4 SIMM slots that allow for upgrading to 2 MB.^[1]

The 950 includes a key to limit access to various subsystems depending on the computer's use environment. The key switch has three positions labelled OFF, ON and SECURE. The OFF position immediately cuts the power and prevented the computer from being powered on. The ON position allows the computer to operate normally. The SECURE position was intended for use as a server – power was always applied in this position. If the computer lost power, it immediately starts up when power was restored. Also, this position disables the keyboard, mouse and floppy disk drive.^[5]

The Workgroup Server 95 models include the 'Workgroup Server PDS Card', which provides three capabilities: Two SCSI controllers with two internal SCSI connectors (plus one external connector); a DMS SCSI control chip that reduces I/O load on the main CPU; and 128 KB of SRAM which is used as an L2 cache. There are three additional slots that provide the ability further expand the L2 cache to 512 KB.^[6]

Models[edit]

The Quadra 950 was announced on March 18, with dealers receiving machines around May 18.

Introduced May 18, 1992:

• Macintosh Quadra 950: 33 MHz 68040 CPU.^[7] $7,200 for a floppy drive only model, $8,499 with a 230 MB HDD, and $9,199 with a 400 MB HDD.^[2] 8 MB of memory was standard everywhere except for some European countries, where the standard included memory was 4 MB.

Introduced March 22, 1993:

• Workgroup Server 95: Sold in several configurations, all of which include a 33 MHz 68040 CPU and a PDS card containing a fast SCSI connection.^[8] In the United States, the configurations were split into 'File and Print', and 'Database' configurations:
  • File/Print: 16 MB RAM, 230 MB HDD, 128 KB L2 cache. $7,589.^[9]
  • File/Print: 16 MB RAM, 500 MB HDD, DDS-DC digital tape drive, 256 KB L2 cache. $10,039.^[9]
  • File/Print: 32 MB RAM, 1000 MB HDD, DDS-DC digital tape drive, AppleShare Pro, 512 KB L2 cache. $12,839.^[9]
  • Database: 32 MB RAM, 230 MB and 500 MB HDDs, DDS-DC digital tape drive, 256 KB L2 cache. $11,319.^[9]
  • Database: 48 MB RAM, 230 MB and 1000 MB HDDs, DDS-DC digital tape drive, 512 KB L2 cache. $12,929.^[9]

Specifications[edit]

• Processor: Motorola 68040
• Processor Speed: 33 MHz
• Processor Cache: 8 KiB L1
• Processor Bus Speed: 33 MHz
• Hard Drive: 230 MB - 1 GB
• Media drives: 2x CD-ROM drive, 1.44 MB floppy drive, optional DDSDC drive
• Software: Mac OS 7.1 - 8.1
• Logicboard RAM: None
• Maximum RAM: 256 MB
• Type of RAM Slots 16 - 30 pin SIMM
• Minimum RAM Speed: 80 ns
• Interleaving Support: No
• Display Connection: DB-15
• Graphics Card: None
• Graphics memory: 1 - 2 MB (four sockets)
• Expansion Slots: 5 - NuBus, 1 - PDS
• Hard Drive Bus: SCSI
• Backup Battery: 3.6 V Lithium
• Max Watts: 303 W
• Ports: AAUI-15 Ethernet, DB-25 SCSI, 2 Serial, 3.5-mm mono input jack, 3.5-mm stereo output jack

Timeline of Macintosh Quadra and Centris models

References[edit]

1. ^ ^abPogue, David; Schorr, Joseph (1999). 'Chapter 12: From 128K to Quadra: Mac to Mac'. MacWorld Mac Secrets, 5th Edition. IDG Books. pp. 484-485. ISBN0-7645-4040-8.
2. ^ ^abcPoole, Lon (July 1992). 'Quadra 950 - Apple accelerates the Quadra 900 and gives it a new name'. MacWorld Magazine. pp. 144–153.
3. ^Pogue, David; Schorr, Joseph (1999). 'Chapter 12: From 128K to Quadra: Mac to Mac'. MacWorld Mac Secrets, 5th Edition. IDG Books. pp. 482–483. ISBN0-7645-4040-8.
4. ^Heid, Jim (October 1995). 'Power Mac - The Next Generation'. MacWorld Magazine. p. 97.
5. ^'Quadra 900, 950, AWS 95, WS 9150: Security Keyswitch'.
6. ^Doughtery, Elizabeth (May 1993). 'Apple Finally Steps into Server Market, Introduces Speedier AppleShare'. MacWorld Magazine. pp. 64–66.
7. ^'Macintosh Quadra 950: Technical Specifications'. Apple.
8. ^'Workgroup Server 95: Technical Specifications'. Apple.
9. ^ ^abcde'Apple Announces New Family of Powerful Servers for Macintosh Workgroups'. Apple. March 22, 1993.

External links[edit]

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Dec 21, 2020 • Filed to: Solve Mac Problems • Proven solutions

There are lots of people who mistakenly think that the USB drives and hard drives format don’t really matter. But the reality is quite different. Whether it is a hard drive or USB or internal drive, Mac uses different format support. So, you can’t simply use the same drive with both Windows and Mac. As a result, you will need to format the hard drive for Mac. Using the Mac preferred file system is important otherwise the files will be of no use to you.

In this article, we are going to discuss how to format a hard drive for Mac and some related terms too.

Part 1. Situations When Formatting a Hard Drive on Mac:

Before you get deep, you must understand what is the drive formatting. Some people confuse the term with reformatting. Basically, formatting is the process of preparing the storage devices such as hard disk drive, solid-state drive, USB flash drive, or any other for initial use.

The basic operation is termed as low-level formatting which means erasing the existing data on the disk. But it leaves the track to recover the data using the recovery tool.

There is another term related to disk formatting and it is called reformatting. It is called high-level formatting as it is used to prepare the disk for different file system formats. It is usually done during the OS installation or adding a new disk. Reformatting is done to free the storage space from the previous content stored in it.

You can consider disk formatting in macOS in various circumstances. Whether your system has corrupted data, damaged software, impending system upgrade, storage is full, or it is running slow, formatting will fix a lot of issues. Take a look at the scenarios given below and you will be sure that disk formatting will help you.

• If you want to quickly erase all content from the drive permanently without leaving a trace of data on it.
• If you want to change the format of the disk such as PC format like FAT or exFAT to Mac format.
• If you see the message that the disk is not readable by Mac.
• If you want to resolve a disk issue that can’t be fixed by the Repair feature of Disk Utility.
• If the macOS installer can’t see the disk or unable to install it.
• In case the macOS installer says that the drive can’t be installed because it is a part of Apple RAID.

Under all these situations, formatting is most likely to fix your problems and you will be able to use the drive on Mac.

Part 2. How to Format a Hard Drive on Mac:

Formatting is a very simple procedure that is operated in a similar way for all sorts of storage media. So, whether you wish to format the internal hard drive, external drive, or a USB flash drive, the procedure is the same for all. Here is the step by step guide you need to follow to format the hard disk on Mac. Before you erase a disk, make sure that you have a backup of the files you want to keep.

Step 1: Connect the USB drive or external drive to Mac and launch the Disk Utility from Applications.

Step 2: From the left side panel, pick the volume or the drive that you want to format and switch to the Erase tab.

Step 3: As you click on the Erase button, you will see several fields in the section. Enter the given information-

• Name- Enter a name for the disk such as Macintosh HD/SSD/USB Drive or anything else you want.
• Format- You have to choose a Mac supported format from the list. The most recommended format is APFS or Mac OS Extended (Journaled). There are numerous other formats too which will be displayed in the drop-down menu. You can select any format as per your requirement.

• The scheme- If this option is available, then you should choose the GUID Partition Map from the option.

Step 4: After specifying the fields, click on the Erase button at the bottom of the window and Disk Utility will format the drive.

Once the formatting is complete, you can use the disk for a backup drive, sharing, time machine backup, or any other requirement. In case if the drive doesn’t appear in the Disk Utility interface, you will have to disconnect all the extra and non-essential devices connected to Mac. Make sure that the External drive is on and connected properly. Restart your Mac and then carry out the task.

Part 3. How to Perform Mac Data Recovery After Format:

There are situations when Mac users don’t get the chance to create a backup of their data and forced to format the hard drive. But you don’t need to panic. You can get your hands on Recoverit data recovery for Mac. If you have mistakenly formatted the data that you still need, Recoverit is the best chance you have to get the files back. It is a complete data recovery solution that is capable of recovering all kinds of files with wide format support of 1000+.

You can download the software from the official website and install it immediately on Mac. Once the setup is complete, follow the steps below to recover formatted drive files.

Step 1: Specify Location:

Win casino slot machine. Run the program and specify a location from the main drive. If data is lost from an external drive or USB flash drive, then you’ll have to connect the drive with the system and then specify the location.

Click on the Start button to initiate the scanning process.

Step 2: Scan Results:

Depending on the data that is lost or deleted, scanning will take some time. As the process finishes, the files will be displayed on the screen according to their respective format.

You can decide whether you want to look for files according to file type or file path. You can also stop the scanning process in between if the results are displayed before the scanning finishes.

Step 3: Preview and Recover Formatted Data:

As soon as the data is displayed on the screen, you can have a preview of the files. Select as many files as you want and have a preview of the files. Tap on the Recover button to save the files on your system.

As you are retrieving the files, keep in mind not to save the files in the previous location. Depending on the amount of recovery, it will take a while and ultimately you’ll have your files back. If the normal scan doesn’t work for you, Recoverit also has a deep scan mode to look deeper for the deleted and lost files.

Part 4. Different Formats of Hard Drive for Mac:

Mac Hard drives have wide support for formats but there are two major formats that are preferably used by the Mac users. It also depends on the macOS version you are using. The key point to consider is that the drives formatted with the newer versions won’t be recognized by the older devices. So, when you are formatting a USB drive, it will be ideal to choose the right format which is Mac OS Extended.

The supported Mac formats for the drive are explained below:

APFS:

The APFS format is optimal for Solid State Drive such as flash drives. Hence, if you are formatting a flash drive, you should definitely choose the APFS format. Along with the flash drives, this format is also faster and more reliable for Mac hard drives.

Mac OS Extended:

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Talking about Mac OS Extended, it is perfectly suitable if you want to use a drive for backup. The Time Machine feature of Mac still doesn’t have support for APFS disk. In case you select this format, Time Machine will prompt you to reformat the drive.

When you are formatting disk on Mac, keep some things in mind. Never ever change the inbuilt format of a Mac drive. Staple wars mac os.

Part 5. Tips for Formatting a Hard Drive on Mac:

Even though formatting doesn’t seem like a big deal, still it can be very helpful. So, you must stay active and keep all things in mind. Here are some tips that might help you when you are about to format a Mac hard drive.

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• Disk Utility in macOS Sierra and later chooses a compatible format for you automatically. But you should know the default format for your drive. It is advised not to change the default format of a Mac hard drive under any circumstances.
• You can check the format of a drive inside the Disk Utility Menu bar. Just click on the Get Info option and you’ll know the current format a drive is using to store files. Open the System information and select the storage. In the right-side panel, you will see the respective format for each volume on your Mac.
• If you want to erase your disk before you install the latest High Sierra on your Mac for the first time, then opt-out for the Mac OS Extended format. During the installation of OS, the macOS installer will automatically decide whether to use APFS or Mac OS Extended for the disk.
• You can also use the FAT32 format on Mac for USB drives if you wish to use it on both Mac and Windows. The FAT32 format can be read and written on both OS and hence it is the most versatile format for use.
• If you wish to transfer big files from Windows to Mac, you’ll still have an alternative, i.e. exFAT. This format doesn’t have a file limit but it can only be read on Mac OS X Snow Leopard or later.

So, before you pick out the format, look out for the advantages and the disadvantages of the formats to choose the optimal format for Mac. The Windows supported format is usually listed as an MS-DOS format in the list of formats.

Wrapping It Up:

As you can see, now you know how to format hard drive/ USB flash drive/ internal drive/external drive on Mac. So, from now on whenever someone is in need, you can help them. And formatting doesn’t always finish without complications. So, if you lost some important files while formatting the drive, you can use Recoverit data recovery software for Mac to restore them in the original condition. Recommend the software to your friends and family and let them know that there is a master tool for recovery for both Mac and Windows OS in the market.

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