Microsoft KB Archive/828860

= Dynamic disks do not come online after you restart the server =

PSS ID Number: 828860

Article Last Modified on 1/26/2004

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The information in this article applies to:


 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional
 * Microsoft Windows 2000 Server

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SYMPTOMS
After you restart a server in a storage area network (SAN) environment, one or more disk devices that are assigned to this server may not come online in a timely manner. This problem has been reported on storage devices that use dynamic disk technology to create logical volumes by spanning or by striping disks.



CAUSE
This problem occurs if the host bus adapter (HBA) miniport driver does not report storage devices to the server in a timely manner. If the HBA miniport driver does not report storage devices to the server during server startup, the disk devices will be unavailable to the server. Therefore, the storage devices do not automatically come online.

If one or more members of a dynamic disk set do not eventually come online, the complete volume may be inaccessible until all members of the set come online. Generally, you can bring the dynamic disks online manually or by using a script that calls the Diskpart.exe utility to bring the disks online. However, you will most likely experience this same problem the next time that you restart the server.



RESOLUTION
To resolve this problem, contact your SAN vendor to make sure that the firmware, the drivers, and the configuration are up-to-date and are configured correctly.

Note Microsoft does not recommend that you modify hardware or firmware settings.



MORE INFORMATION
The following diagnostic information was obtained from a server that experienced the problem that is described in the &quot;Symptoms&quot; section:

Start event log sample:

Event Type: Error Event Source:  dmboot Event Category: None Event ID:  2 Date:      7/30/2003 Time:      8:28:13 AM User:       N/A Computer:  NCGCETL01 Description: dmboot: Failed to start volume Volume3 (no mountpoint)

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Data: 0000: 00000000 004e0002 00000000 c0500002 0010: 00000000 00000000 00000001 00000000 0020: 00000000 00000000

End event log sample

Start DMDIAG output sample

Volume3 Spanned       Disk2-01   Volume3-01  Harddisk4   399761334  199880667  1/2 0         63       ACTIVE  ACTIVE Volume3 Spanned       Disk16-01  Volume3-01  Harddisk5   399761334  199880667  2/2 199880667 63       ACTIVE  ACTIVE

Volume2 Simple  J    Disk9-01  Volume2-01  Harddisk6   28547072  28547072  1/1  0 63      ACTIVE  ACTIVE

Volume Volume2: rid=0.1630 assoc=0.0 len=28547072 recover_seqno: 0 kflag=(disabled|rdwr|round-robin|except-det-sparse|writeback) sflag=

Volume Volume3: rid=0.1506 assoc=0.0 len=399761334 recover_seqno: 0 kflag=(disabled|rdwr|round-robin|except-det-sparse|writeback) sflag=

LDM Disk Header Harddisk4

diskid: b31be0d8-04fc-4341-b58e-9275bd618a69 group:  name=DynamicGroup id=7aa7ec2a-8f31-42d6-b3d7-4d71a611d2bf flags:  private autoimport import: bootsig=1178000119 hostid=1b77da20-c717-11d0-a5be-00a0c91db73c diskset: id=ba25818c-c294-11d7-ad48-806d6172696f version: 2.11 iosize: 512 public: slice=0 offset=63 len=199880667 private: slice=0 offset=199891072 len=2048 update: seqno=0.38 time=-1928351340 headers: 2047 1856 configs: count=1 len=1481 logs:   count=1 len=224 tocblks: 0 tocs:   2/2045 Defined regions: config  priv 000017-001497[001481]: copy=01 offset=000000 enabled log     priv 001498-001721[000224]: copy=01 offset=000000 disabled

LDM Disk Header Harddisk5

diskid: 1b0260ac-1a39-4faa-87e3-fc1607aa8fac group:  name=DynamicGroup id=7aa7ec2a-8f31-42d6-b3d7-4d71a611d2bf flags:  private autoimport import: bootsig=1178000119 hostid=1b77da20-c717-11d0-a5be-00a0c91db73c diskset: id=ba25818c-c294-11d7-ad48-806d6172696f version: 2.11 iosize: 512 public: slice=0 offset=63 len=199880667 private: slice=0 offset=199891072 len=2048 update: seqno=0.26 time=-1929288840 headers: 2047 1856 configs: count=1 len=1481 logs:   count=1 len=224 tocblks: 0 tocs:   2/2045 Defined regions: config  priv 000017-001497[001481]: copy=01 offset=000000 enabled log     priv 001498-001721[000224]: copy=01 offset=000000 disabled

LDM Disk Header Harddisk6

diskid: 243622ad-8831-4146-8421-f346c46abf1b group:  name=DynamicGroup id=7aa7ec2a-8f31-42d6-b3d7-4d71a611d2bf flags:  private autoimport import: bootsig=1178000119 hostid=1b77da20-c717-11d0-a5be-00a0c91db73c diskset: id=ba25818c-c294-11d7-ad48-806d6172696f version: 2.11 iosize: 512 public: slice=0 offset=63 len=28547442 private: slice=0 offset=28554112 len=2048 update: seqno=0.51 time=-1928820090 headers: 2047 1856 configs: count=1 len=1481 logs:   count=1 len=224 tocblks: 0 tocs:   1/2046 Defined regions: config  priv 000017-001497[001481]: copy=01 offset=000000 enabled log     priv 001498-001721[000224]: copy=01 offset=000000 disabled

End DMDIAG output sample

