Merge pull request #217129 from roygara/sharedUltra

Updating shared ultra disk information

Author: prmerger-automator[bot]

articles/virtual-machines/disks-shared.md

@@ -4,7 +4,7 @@ description: Learn about sharing Azure managed disks across multiple Linux VMs.
 author: roygara
 ms.service: storage
 ms.topic: conceptual
-ms.date: 10/14/2022
+ms.date: 11/07/2022
 ms.author: rogarana
 ms.subservice: disks
 ---
@@ -128,13 +128,19 @@ Ultra disks have the unique capability of allowing you to set your performance b
 
 The following formulas explain how the performance attributes can be set, since they're user modifiable:
 
-- DiskIOPSReadWrite/DiskIOPSReadOnly: 
-    - IOPS limits of 300 IOPS/GiB, up to a maximum of 160 K IOPS per disk
-    - Minimum of 100 IOPS
-    - DiskIOPSReadWrite  + DiskIOPSReadOnly is at least 2 IOPS/GiB
-- DiskMBpsRead    Write/DiskMBpsReadOnly:
-    - The throughput limit of a single disk is 256 KiB/s for each provisioned IOPS, up to a maximum of 2000 MBps per disk
-    - The minimum guaranteed throughput per disk is 4KiB/s for each provisioned IOPS, with an overall baseline minimum of 1 MBps
+- DiskIOPSReadWrite:
+    - Has a baseline minimum IOPS of 100, for disks 100 GiB and smaller.
+        - For disks larger than 100 GiB, the baseline minimum IOPS you can set increases by 1 per GiB. So the lowest you can set DiskIOPSReadWrite for a 101 GiB disk is 101 IOPS.
+    - The maximum you can set this attribute is determined by the size of your disk, the formula is 300 * GiB, up to a maximum of 160,000.
+- DiskMBpsReadWrite
+    - The minium throughput (MB/s) of this attribute is determined by your IOPS, the formula is 4 KiB per second per IOPS. So if you had 101 IOPS, the minium MB/s you can set is 1.
+    - The maximum you can set this attribute is determined by the amount of IOPS you set, the formula is 256 KiB per second per IOPS, up to a maximum of 4,000 MB/s.
+- DiskIOPSReadOnly
+    - The minimum baseline IOPS for this attribute is 100. For DiskIOPSReadOnly, the baseline doesn't increase with disk size.
+    - The maximum you can set this attribute is determined by the size of your disk, the formula is 300 * GiB, up to a maximum of 160,000.
+- DiskMBpsReadOnly
+    - The minimum throughput (MB/s) for this attribute is 1. For DiskMBpsReadOnly, the baseline doesn't increase with IOPS.
+    - The maximum you can set this attribute is determined by the amount of IOPS you set, the formula is 256 KiB per second per IOPS, up to a maximum of 4,000 MB/s.
 
 #### Examples