操作系统：windows server 2008 (windows NT 6.0)
域环境：windows server 2008 domain
角色：exchange server 2007 mailbox
模式：cluster双机
windows exchange server 2007 Mailbox 角色利用windows 集群功能做热备。现主节点出现问题（node1），需要往备用节点（node2）切换。当切换到备用节点时，通过web outlook access 登陆邮箱，包一下错误。大概是说无法连接邮箱数据库，数据库连接瞬间断开。
具体报错如下
服务端报错：MSExchangeIS (4964) SG_weinan: 从文件“W:\DB_weinan\DB_weinan.edb”读取(偏移量: 62940495872 (0x0000000ea78bc000)，字节数: 8192 (0x00002000))的尝试在 0 秒后失败，出现系统错误 21 (0x00000015):“设备未就绪。 ”。读取操作将失败，并出现错误 -1022 (0xfffffc02)。如果此错误再次出现，则说明文件可能已损坏，并且需要从以前的备份进行还原。
客户端报错： Request
Url: https://sn.mail.admin.cn:443/owa/lang.owa
User host address: 120.1.1.180
Exception
Exception type: Microsoft.Exchange.Data.Storage.ConnectionFailedTransientException
Exception message: Cannot open mailbox /o=CNC/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=lbb.
Call stack
在 Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry) 在 Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry) 在 Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString) 在 Microsoft.Exchange.Data.Storage.MailboxSession.Initialize(LogonType logonType, ExchangePrincipal owner, DelegateLogonUser delegateUser, Object identity, OpenMailboxSessionFlags flags) 在 Microsoft.Exchange.Data.Storage.MailboxSession.CreateMailboxSession(LogonType logonType, ExchangePrincipal owner, DelegateLogonUser delegateUser, Object identity, OpenMailboxSessionFlags flags, CultureInfo cultureInfo, String clientInfoString) 在 Microsoft.Exchange.Data.Storage.MailboxSession.Open(ExchangePrincipal mailboxOwner, WindowsPrincipal authenticatedUser, CultureInfo cultureInfo, String clientInfoString) 在 Microsoft.Exchange.Clients.Owa.Core.OwaWindowsIdentity.CreateMailboxSession(ExchangePrincipal exchangePrincipal, CultureInfo cultureInfo) 在 Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchLanguagePostLocally(OwaContext owaContext, OwaIdentity logonIdentity, CultureInfo culture, String timeZoneKeyName, Boolean isOptimized) 在 Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchLanguagePostRequest(OwaContext owaContext) 在 Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.PrepareRequestWithoutSession(OwaContext owaContext, UserContextCookie userContextCookie) 在 Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.InternalDispatchRequest(OwaContext owaContext) 在 Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchRequest(OwaContext owaContext) 在 System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 在 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Inner Exception
Exception type: Microsoft.Mapi.MapiExceptionNetworkError
Exception message: MapiExceptionNetworkError: Unable to make connection to the server. (hr=0x80004005, ec=2423) Diagnostic context: ...... Lid: 12952 dwParam: 0x6BA Msg: EEInfo: prm[0]: Long val: 135 Lid: 15000 dwParam: 0x6BA Msg: EEInfo: prm[1]: Pointer val: 0x0000000000000000 Lid: 15000 dwParam: 0x6BA Msg: EEInfo: prm[2]: Pointer val: 0x12085D0A00000000 Lid: 16280 dwParam: 0x6BA Msg: EEInfo: ComputerName: n/a Lid: 8600 dwParam: 0x6BA Msg: EEInfo: ProcessID: 4864 Lid: 12696 dwParam: 0x6BA Msg: EEInfo: Generation Time: 2014-10-15 18:42:36:58 Lid: 10648 dwParam: 0x6BA Msg: EEInfo: Generating component: 8 Lid: 14744 dwParam: 0x6BA Msg: EEInfo: Status: 10060 Lid: 9624 dwParam: 0x6BA Msg: EEInfo: Detection location: 318 Lid: 13720 dwParam: 0x6BA Msg: EEInfo: Flags: 0 Lid: 11672 dwParam: 0x6BA Msg: EEInfo: NumberOfParameters: 0 Lid: 19778 Lid: 27970 StoreEc: 0x977 Lid: 17730 Lid: 25922 StoreEc: 0x977
Call stack
在 Microsoft.Mapi.MapiExceptionHelper.ThrowIfError(String message, Int32 hresult, Int32 ec, DiagnosticContext diagCtx) 在 Microsoft.Mapi.ExRpcConnection.Create(ConnectionCache connectionCache, ExRpcConnectionCreateFlag createFlags, ConnectFlag connectFlags, String serverDn, String userDn, String user, String domain, String password, String httpProxyServerName, Int32 ulConMod, Int32 lcidString, Int32 lcidSort, Int32 cpid, Int32 cReconnectIntervalInMins, Int32 cbRpcBufferSize, Int32 cbAuxBufferSize) 在 Microsoft.Mapi.ConnectionCache.OpenMapiStore(String mailboxDn, Guid mailboxGuid, Guid mdbGuid, ClientIdentityInfo clientIdentity, String userDnAs, OpenStoreFlag openStoreFlags, CultureInfo cultureInfo, String applicationId) 在 Microsoft.Mapi.ConnectionCache.OpenMailbox(String mailboxDn, Guid mailboxGuid, Guid mdbGuid, WindowsIdentity windowsIdentityAs, String userDnAs, OpenStoreFlag openStoreFlags, CultureInfo cultureInfo, String applicationId) 在 Microsoft.Exchange.Data.Storage.ConnectionCachePool.OpenMailbox(String serverDn, String userDn, String mailboxDn, Guid mailboxGuid, Guid mdbGuid, Object identity, ConnectFlag connectFlag, OpenStoreFlag openStoreFlag, CultureInfo cultureInfo, String clientInfoString, Boolean secondTry)
希望各位大侠能帮我出主意解决一下，着急，小弟在线等 ！
