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I have Windows 8.1 Professional x64 running from a 256GB OCZ Vertex 4 SSD.

Windows has divided the drive in to two partitions:

  1. System Reserved (350MB NTFS)
  2. C: (238.13GB NTFS)

Whenever Windows attempts to optimize the System Reserved partition, I get an error in the event log:

Log Name:      Application
Source:        Microsoft-Windows-Defrag
Date:          1/29/2014 11:07:54 AM
Event ID:      257
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      My_Computer
The volume System Reserved was not optimized because an error was encountered: The parameter is incorrect. (0x80070057)
Event Xml:
<Event xmlns="">
    <Provider Name="Microsoft-Windows-Defrag" />
    <EventID Qualifiers="32768">257</EventID>
    <TimeCreated SystemTime="2014-01-29T17:07:54.000000000Z" />
    <Security />
    <Data>System Reserved</Data>
    <Data>The parameter is incorrect. (0x80070057)</Data>

Should I just remove this from the list of items that are on the optimize schedule or is there a way to fix this issue such that the optimization can succeed?

Not only on SSD but also on Hard Drive the problem exists: System Reserved Needs Optimization

share|improve this question
It's an SSD. It doesn't get defragmented; it gets "optimized" (TRIM, I think). And that's just the way Windows set things up. In "Optimize Drives" it says the "System Reserved" drive "Needs optimization". I do not know why Windows thinks it needs optimization. – PaulH Jan 29 '14 at 18:13
The event just says that an application called Microsoft-Windows-Defrag failed to optimize a drive. Not that the particular optimization it tried to apply was defragmenting. – PaulH Jan 29 '14 at 18:17
I have the same problem, but I have HDD. It won't optimize even if the message states: SYSTEM RESERVED HARD DISC Needs Optimization (36% fragmented) – Devid Jul 16 '14 at 15:56

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